If you have to main heal in a pt, get a new one. If you are main healing out of choice, urdoinitwrong.
You can back up heal on something like Ultima if your LS prefers to have no melee on it, salvage, etc. Those types of things you can sit back and cure (you not the puppet), but never in a pt.
so im guessing for you its rng or gtfo?
im probably gonna get flamed for this, but pup isnt a dd or a healer or a nuker. pup is a dd and a healer and a nuker. there are different attachments, different frames, different sub jobs all to allow you to play pup in a multitude of ways. if you want to be a healer or want to be a dd, then do it. but to say that a job that can spam cure V or reven III cant heal is just dumb. it might take more work/attention, but the attachments and job is set up so that you can.
if you are just looking to do dd and only dd and do lots of dd and not be asked/wanted to do anything besides dd, go lvl sam. they could use a couple more bandwagons.
if you want to heal, get a damage gauge, get an optic fiber and play around with it. you might like it.
99war 99mnk 96whm 99blm 90rdm 99thf 85pld 99bst 99brd 99drg
99blu 99pup 60sch 99dnc 99nin 99sam
50/50 glavoid shells
50/50 itz scales
6/75 orthrus claws