This is straight up dumb
It's so easy yet you're expanding too much on a simple comparison
A defense buff equals a Regen buff (You get little quantities of it on 3 turns)
A damage cut equals a Heal (You get it all right away when you need it)
It's obviously better to have a Healer than having a Regen enabler so is obviously better having a Damage Cut skill than having a Defense Buffer
Especially if you as almost everyone struggle with overdrives since you use your skill there where it prioritizes it instead of having it split in 3 turns, when building a team you don't look at all on Defense Buffers. The priorities are Debuffs > Healing > Damage > Damage Cut / Rage meter throttle.
That said we can all come to the conclusion that if a Kamihime has a Defense buff it's an okay addition to your team but you aren't out there looking for it as you are looking for -40/40 debuffs and a healer, oh and god forbids you're running more than one while having better options
For Healing is the same; maybe you're in the Raging bar and for some reason you couldn't stun the Boss, so the next turn you know you're getting an Overdrive Blast to the face and a heal might save your party before starting that turn
A Regen will give you around the same (normally less than a Heal, just like a defense buff gives you less than a damage cut in most scenarios) split into three turns.
Comparing defense buffs with debuffs, that I find pretty dumb, even more if you're doing it the way someone in the thread is, saying that Amaterasu's buff isn't useful because it doesn't add up to the same degree that a debuff would when Amaterasu has drumroll please a -20 Attack and -20 Defense debuff too which is the same that Sol provides you -20 Attack Debuff with an extra Defense debuff rather they are in a different Frame and that's one of the three things what makes Sol so especial (ofcourse, ofcourse I'm not comparing a B Frame which is pretty common and even has an EX skill around it with a C Frame like Sol of Cthulhu. I just want to help new people to see the degree of their debuffs); meh??? I don't know anymore lol. This became really cringy in a few hours you could've been better saying "Andromeda's Debuff" isn't as good and it would've atleast seemed like you put thought on your words rather than comparing a buff with a debuff on a Kamihime that has both