OP, you do know that there is more to AST than just AoE balance/spear/arrow, right? Clearly you don't because you DC yourself when you get another AST in the party, which is a non-compliance to the ToS that can get you banned. Someone of this mindset, with an inability to adapt, coordinate with their co-healer, and choosing to be a detriment to the party by forcing them to wait for another healer very likely isn't playing AST correctly to begin with.

You should know right off the bat that the DF already uses an algorithm so two of the same job are not paired together. If you are paired with another AST, it means that there are no other healers in the queue, or none that meet the requirements for the duty you are in. I strongly suggest you learn to adapt, stop being selfish, and if you just can't deal then eat the penalty, or just don't play AST. You have a role to fill in there, so cut the BS that is "whoa is me! I can't use my cards the way I want because there's another AST." The game doesn't revolve around you.

There is a reason why card effects overwrite each other, and there is also a reason why RR also provide potency or duration buffs to your cards. I shouldn't even be telling you this if you are an AST main, especially considering I am not one.