On the Angel path, once you get the mana-cost upgrade, you really need to view things in terms of taxes. Even at 430 percent, Call To Arms is worse than Tax Collection...on it's own. However, when you consider that it boosts Tax Collection by that same 430 percent, things turn into capping mana, Calling, then spamtax.
Might I suggest making it so each faction coin exchange does something different? Something, for instance, thematically in tune with the faction in question?
It would be kind of neat if there was a actual 'economy', so to speak--like, you can make plants, or you can toggle a button that makes plants reproduce for double the cost, but it's automatic.
Could we maybe, i dunno, be able to press a button that pays for everything in a stage and instantly advances us to the next, buying all the upgrades that haven't already been bought? It'd save a few hundred clicks a reset...
Perhaps there should be "stock splits" every so often...? you know so we can actually afford Pink/Pink is actually worth buying? Say, if the price of Pink goes over 2k, it splits into double the shares?
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