You'd have to be an idiot to think pure gems are better then dual gems a) Firstly compare the bonus from the mastery's 1. green level 5 Pure gem mastery maxed 59-139 dmg 119 range 60 attack speed 7% min 14% max 7% range 7% attack speed (that's only 2%(4 for max) after wasting all those points) 2. green + (level 1) red level 5 dual Gem mastery maxed 79-184 dmg 126 range 63 attack speed 16% to min dmg 32% to max dmg 16% to range and firing speed specials at 70% dual gems are 42% more efficient(assuming your using all the range + adding firing speed) at the small cost of 30% of the special which is usually worthless. b) most levels have more then 3 gems which can be summoned thus using dual gems will make your life easier because you have a wider selection of gems you can combine the one you created with. c) prismatic gems suck majorly, weak on all damage and only giving on average 50% of the bonus's is awful. d) There is no d! ;[
Dual gems. They rule majorly (as pointed out in above post). The higher percentages are sooo much more worth then the slightly more efficient specials in pure gems.
Plus, if you need some starter gems (which I really do in levels with no starting towers), it's easier to get them upgraded if you mix the colours~
Dual gems are way better than pure gems in towers. Sticking to pure gems is way too hard on some levels and dualing is the only effective way to reach some higher grade gems. The only real purpose for pure gems would be for a pure green or blue in a trap.
I guess that's the point though. The traps are supposed to play on a gems specials so pures are actually better for this use.
I repeatedly made grade 3 duals and pures, and looked at the stats side-by-side. The stats were always very close, pure was better sometimes also. In my opinion, the extra bonuses that duals get sound like alot, but aren't that significant. Since they lose special power, i'd go for pure gems.
Started a new game (needed to check something in the lower levels), and I have concluded that this is oh so very true.
Without the dual or pure gem Mastery Skill, pure gems are a tiny bit better. As soon as you're able to upgrade the mastery skill, though, you're most likely better off going for the dual gems in most levels, as the get higher bonuses.
I'll consider the final level an exception to that, though. Pures are working better for me there.
Dual gems, they have both better advantages and more diverse advantages as well. Also, there is a skill for giving dual gems more advantages, all the more reason to use them, unless you are in a do-or-die situation. If that's the case though, you'll most likely die. O.-
I thing it depend on what strategy you use. pure gems is very good for traps, but duel gems have better damage. I allways use duel gems to tower and pure gems for traps.
you know I mostly use the prismatic one. mostly one, because you only get all of the eight colours when you have all the skills with tose gems. and ofcorrs on some maps. after the prismatic I use the combination of 2 gems, they are stronger then pure. you should use the pure only for traps. the dual for the towers.