Originally Posted by IndigoOzir

Well you don't need to do a lot of runs in quick succesion, there's a scroll bar, just scroll down to use the ally that you want :B

Not all allies show up even when you scroll. The list is of limited length.

Originally Posted by Unregistered

why do people farm 2-1 for secret gardens instead of just farming E-1/R-1 for event currency and secret gardens at the same time

Events don't spawn secret gardens nearly as often as the campaign maps IME.