Glad to see someone else using no focus.

I got around this issue by doing

/cast [target=player] InsertHealingSpellHere

Eventually on all my (squishyesque) guys. Ideally I'll do a 1 heals 2, 2 heals 3, 3 heals 4, 4 heals 1 setup, but that causes it's own issues (what if 1 dies - noones healing 2) but that's for another thread.