I found an alternate solution to alouette, that sounded just fine to me, either i am tone deaf or this game has a limited perspective on potential songs...
It looks like only one ability can trigger on each strike, so now that my vampire is max level, i am regretting upgrading undead sympathy at all. Not only does it have a big drawback, but I would rather the other 2 abilities triggered every time.
I may just be superstitious, but my win percentage on the slot machine was much higher when I clicked just as the sub begins descending. Also don't bother with slots until you have full slot skills.
If i could tell my units to target necromancers and healers first, I wouldn't be stuck on the temple of healing. Maybe i just need to reset my skills again...