At full(ish) HP 1 CF buff heals for 4.5k, 2 CF buff heals for 4.9k, 3 CF buffs heals for 5.5k, if stacked 3 times should the heal of (3)CF be 3 x 4.5k = 13.5k per tick not 5.5k (or am I being overly optimistic and reading the skill description completely wrong?).
Camellia "stacking" was never multiplicative, although I wish it was :\
Its always been more like:
4.5k= 1 stack
4.5k x .10 = 450 (benefit you get from 1 higher stack)
Then 4.95k (total at stack 2) x .10 = 495 + 4950 = 5445 (total healing at stack 3)
Thats how it
somehow works. The stack multiplier is closer to .12, but you get the idea

Theres also probably some wisdom/mdmg/hpbi mumbo jumbo that also altered the benefit of each stack.
Question: How much is camellia healing when you switch to offgear, at 3 stacks? I'm curious to know if the healing in offgear matches the healing it does when it gets that 50% hp "perk"
You can reply here or I'll bug ya in-game o.o