This game is very difficult in terms of walkthrough writing, because contrarily to many idle games, it demands flexibility, while a lot of idle games will simply tell you : Buy this, keep it, and buy the next thing.
Here you must juggle, from beginning until the end (unless you have enough points but this happens either because you paid, because you reached further than the ending or even if you have tampered with the save file (!)), you will have to be flexible and focus on specific things to maximize what you are aiming to produce.
Here is a list of general tips, some more advanced than others. Be careful, there are spoilers and I will try to hide them with the help of the tools (except I didn't find the tool to hide - so I've put a warning when there is a risk !).
-Always try to be flexible and analyze everything you unlock/unlocked. Some things you just got are great, others aren't at first and then they become great… some were great, became useless and then become great again (…). The game, in terms of efficiency, is a lot about making choices and focusing at times on specific aspect to maximize returns. While some other idle games are ''simpler'' : whatever you unlock, you keep and it helps. The complexity of this game makes the flexibility it asks from you a source of fun and enjoyment.
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-(Following contains spoilers for 2nd zone, more specifically for E50, E60 and E71$, be careful). Some brothels will help you make items faster (300x when full of units and with bonus), make prayers faster (97x when full of units and with bonus), make lobby easier (x60 with 300 001 units and bonus), etc. Try to keep this in mind. For me, I got very surprised by the x60 for the temple because I had focused quite a lot on it… and ''discovering'' this x97 helped but… I had already nearly reached the levels I wished, and even those (17-10-8-8 in order was my objective – I was very close to these when I reached the brothel that gives the x97 bonus) probably were ''too much'' in regards to the benefits they gave and efficiency. So, simply know that there is around E50 a Brothel that shall help you make a lot of items more easily (x300 speed) ; around E62 a brothel that shall help you make prayers faster (unlock faster the upgrades, x97 speed) ; and the before last brothel that shall help you make lobby (especially 3rd campaign) faster (x60)
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-(Following is Spoiler for 4th tab which is Prestige Tab + a bit of spoiler for a way to reach the ending a bit faster + spoiler for last tabs of 2nd Zone) Understanding Prestige (God Deals) and manipulating them is the Key to victory. Many asked what should they pick as first deals… It depends ! What is your playstyle ? What is your objective ? All in all, here is the answer for all your questions : What are you trying to accomplish ?
If you're aiming to make more money, than the deal to triple effects from bonuses is great. If you're aiming to spend less then the discount deal is excellent. Aiming to play in an idle way ? No problem we got you covered with the H24 deal. Want to help the Developer and team behind the game + make your life easier ? Take 4th wall and give your wallet !
In general, from mid-game to end game, your runs shall be (in general, now more or less you can remove or add phases but I speak in general) : (Max style if you have then buy style the upgrades in the fundamental talents) Students creation + unlock the highest brothel you can (to have more $ to unlock the laboratory upgrades you need to maximize actual phases and later phases) Items/factories upgrades (because they take time) and fundamental energy creation (to make new artworks and buy FE upgrades in the fundamental talents) $ focus Lobby focus (one of the last brothels shall give you a boost to the lobby progression by x60, you'll need it especially for the 3rd and last campaign) When you feel you reached a wall in the lobby progression then you can farm $ and ruin everything later when, with the help of your handy and personal Excel sheet, with the help of the formulas provided by the encyclopedia, know you have enough style points to buy the upgrades you wish to buy in the fundamentals talents (right side) Restart the path.
As you can see: Once you understood enough all the information you have at hand, you can relatively easily see a path that is quite optimal in terms of fun and progression to progress, progress, progress… and reach the end.
Lastly, concerning the 5-points prestige deals. In terms of importance, more or less and depending of course of your progress and stats (especially laboratory and lobby campaigns), all 6 are important, but some more than others:
-Conviction is great most of the time once you begin to progress in the campaigns;
-New Sexy is great to boost schools (Remember: FLEXIBILITY! You won't need New Sexy for certain phases and you'll have to remove it unless you have enough Prestige points because other 5 points deal shall procure you more $ productivity ;
-Freeze is quite balanced, it helps everything (except lab gains) in the human world. Take it as x2 multiplier for nearly everything in the human world since time passes 2 times faster. You can store time but its use case is quite limited while staying an interesting mechanic;
-Inflation: I think I used it only once. It is more adapted to an idle playstyle OR when you really wish to push for something (potentially x24 multiplier with freeze benefit that makes time go 2 times faster BUT unless you are at the very end of the endgame, an active playstyle make you progress faster. As an example, player ''Scarbrow'' didn't need the last brothel. With a 24x bonus from inflation, he managed to finish the game (and win a lot of time in this situation I believe) with the before-last brothel. And sadly no, you can't store time with Freeze, then free it to make inflation get the bonus you aim for, then again release the same stored time to benefit for the time you stored from Inflation : You'll need to store again (a second time) to benefit from the bonus (...) and why should you do this since in all cases inflation shall directly apply to your situation. No need to store time. Just to be clear : you can't store 2 hours, relase them a ''first time'' to make inflation give 200% bonus, and then release the same stored time a 2nd time to benefit for these 2 hours of the 200% bonus. You'll have to store again. So not a useful strategy, especially since other 5 points deals are more time-efficient UNLESS you plan to make a long run and get inflation to a high multiplicator ;
-Science beach (''SB'') is great but depends a lot of your lab levels. Typically, a 5 levels management factory with SB gives approximately a 4.21 multiplicator to $ production in brothels, while Inflation with freeze shall give you a 4.5 multiplicator after 4.5 hours if I am not mistaken. Except that : Inflation shall give you such an edge after 4.5 hours. And if you're limited, like you shall be during nearly all your playthrough, in terms of prestige points, you won't benefit of this bonus and of the SB bonus at the same time, you must choose. And the benefit of inflation shall not apply to these 4.5 hours. So you have lost 4.5 hours. Ok, but you won 4.5 multiplicator (Great!). Except now you must wait another 4-4.5 hours for… what ?
Hopefully the following example is a correct one and no mistakes were made : In 1 case, SB gives (let's say) 4.21 X 10 (hours) X 1$ (1$ per hour with other bonuses for the sake of the example lol) = 42.1$
Inflation shall give : (4.5 x 5.5 (hours) x 1$) + (1$ X 4.5 hours)) = 29.25. Yes you saw that correctly. So you'd need a higher multiplicator from Inflation and ''lose'' more time to win back and win more from what you ''lost'' by not using SB which becomes (in my opinion after Inflation) the ''worse'' 5 points god deal (I don't take into account New Sexy that depends of different factors). If you aim for efficiency, and unless you are reaching a specific goal like Scarbrow did, Inflation is then less efficient than SB with an active or hybrid (semi-active/semi-idle) playstyle ;
-Transfer is great but don't forget to give the Fundamental energy you've accumulated with the lab upgrades and SB if possible, every point helps to make it better.
So in my opinion and of course taking into account factors like campaigns and lab upgrades, so the order may change (especially between Conviction, Transfer and SB) :
Conviction >= Transfer >= SB >= Freeze >= Inflation.
Finally, keep in mind : Each of these 5 points... is preceded by deal that may or may not be as interesting as others depending on your progress and personal objectives/focuses. So you must also take into account these 3 deals that precede these 5 point deals because they also impact your judgement and how you should, depending on your prestige points and objective(s), spend your points !
The game is complex and you may have many questions that aren't answered here. Feel free to ask them below and all of the community shall try to help you