Try Peppermint shrimps..two took out my early few aips and have kept them under control since..Also have you tried fresh hot water injections, or kalk wasser mixed with lemon juice???
Oops..just remembered your fuzzies...that's the shrimps out the window then,lol....
Their is also a nudibranch available occasionally that eats only aips...Aeolidella stephaniae, old name Berghia verrucornis....worth trying to track one out.
Several butterflies take these, like copperbands, wimples, long nose ,etc....however they also take fan worms, yube worms, etc and may nip at some lps corals as well