Ok thanks Kurenai, that helped me a lot. I think I might go with E. Cactus / Phoenix-chan this time around; after clearing up my misconception that other girls like Soapwort and other's healing ONLY applies to herself, Phoenix-chan looks very viable, and I can test her in many set-ups (well, I don't have that many rainbows, but it'd be fun to play around)...and seeing how she is only one that heals multiple girls w/o need of promo abilities, 'cuz I do need my provoc. on Safforn, etc...

And also, on the note of healing, what about Soapwort in counter team as extra healer? She also has super counter. Safforn w/ provoke, Soapwort as healing, and 3 other girls add promo. healing ability, so they also get healing boost when Soapy gets it? Does that even make sense, and how's it for an idea? Something like...

Safforn w/ provoke
Soapwort (Super counter / 40% chance to heal 25%)
Counter Girl (i.e. Apple Tanabata) w/ added healing promo ability
Another Counter Girl w/ added healing promo ability
#5 maybe...Easter Cactus for extra healing shenanigans

Ofc we'd have to sacrifice "Depend Rate up" for the Healing Boost promo. ability, so not sure if this kind of substitute would be worth considering?