[ATM9] - '%current HP damage' from Apotheosis?

I seem to recall %current damage being pretty good in ATM8, did something change? I have some on my weapon, along with armor shred, and more in the sockets. But it does nothing on Pigliches, the Wither, or the Netherite Monstrosity I found next to my Nether Portal in the Nether(fun to find that in iron armor...)

Also, do Pigliches not drop hearts at all? I've given myself wrist issues killing a few of them now and nothing.

Do I just need more % or am I missing something?