Here Is A Little Mini-Walkthrough for Harder Mode:
First Age:
Wait until 4-6 enemies are on the screen, and then use your special. It should give you some extra cash (and you need it, trust me!)
Don’t bother with turrets. They don’t do much. Focus on balancing clubmen with slingshot men, and throw in Dino riders if you can afford it. Keep doing this until you get to the 2nd age.
Second age: try getting at least ONE fire catapult.
Focus mainly on swordsmen, but throw in a couple archers here and there. In desperate times get a knight out on the field, and use you special ONLY when you need it. Do this until the 3rd age.
3rd age: try to aim for 1-2 small cannons or one large cannon. Don’t even bother with cannoneers; they flat out stink. Try to make 3/4's of your troops duelers and the other 1/4 mosquetters. Your special for this age HEALS YOUR MEN. It’s good for when you have little troops but don’t have any money. Keep doing this until the 4th age.
Agh. the 4th age. At LEAST get a rocket launcher turret. Tanks are good, but only use them in times of need. Your special comes in handy when the enemy is at your base; it wipes out quite a lot. So use that only in times of need. Basically you should even out with melee infantry and ranged infantry. You COULD wipe them out in this age, but its almost impossible. Keep doing this until the LAST AGE.
The 5th age... (Also known as last age) well... this one is REALLY easy. All you need to do is keep killing the enemy with god's blades until you have enough for 3 Lazer turrets (they radiate red energy)
do NOT produce ANY TROOPS WHEN YOU HAVE THE 3 TURRETS. Keep letting your turrets beat the crud out of the enemy until you have 1 Million gold. (It takes a long time!!) When you finally have the gold, generate the following in the following order: war machine, super soldier war machine, super soldier war machine super soldier war machine super soldier war machine super soldier.
If you have these out on the field after using your special, you win. No questions asked. (P.S the super soldiers do 400 damage to the enemy base per hit!!!!!!!) If you have any questions referring to this guide, please contact me at my email address: deathdoom89@hotmail.com
its really for harder mode, but it will still work on normal. ive tried it. still no guides on impossible though.
but yeah if you buy 4 ion's it will hurt enemy base over time, but i would rather end it quick.