So, it seems to still be the case that the gems you put in your amplifiers should be at least one of the types of the gems that they're amplifying. So, if I had a black/white/red/yellow gem, what kind of gems should I put in the amplifiers? Pure of any of those kinds? Dual, triple, quad? Any particular balance? And how high of a level is it worth boosting the amp gems to?
Or, on an earlier level when I haven't yet unlocked Poolbound, I have red/orange/black/yellow, and am using all four. Which ones are worth amping?