I just want to add that not every raider was fishing only for balance (even in speedkill).
I did every content in this game, progress and speedkill, and AST sure was aiming for balance, but he needed to deal with what he got, and do his best with their cards depending on several factors.
Every fight was different because of the randomness of the draw, and I was not bored to do the same fight again and again because of it.
For me, this impredictibility was what separated AST from every other job in this game and it need to come back with the old cards system.