3 Merc slots is unacceptably limiting

Its becoming increasingly obvious that 3 is just not enough to explore literally anything possible with mercs, doryani's being overpowered aside theres very very very little we can do with only 3 slots im not sure why this limitation was set in the first place it seems pretty toxic tbh.

Also getting the merc you want is absurdly difficult we need like more blocks or maybe ways to make it so that only the ones you have recruited show up or something, theres dozens with tons of skill combos and gems on top of that, it doesnt have to be fully customizable but its insane to see the one i want maybe 4-5 times in 1000 maps.