Thunder already had Special Ryu-Oh as a healer.
... though I guess that doesn't count as she's limited edition...

Anyway, that heal is Nike level of bad. Better than nothing, I guess, but... not by much. And are you have that attack up buff right? Since that's quite out of line, as party wide attack up buffs are usually 20% even from SSRs.
EDIT: Oh, it lasts one turn. Fair enough then.