[Autumn]

Kingslayer does not seem to boost Ether Invitation's damage by the UL%

Tested on a Gigas Rex with 20 defense:

[Neus]

Not a bug, Kingslayer doesn't increase damage, it increases total Power. Furthermore, Ether Invitation is a special attack that replaces the damage done with your missing HP + Claret Call's bonus, so it doesn't benefit from damage boosts like Kingslayer/etc.

[Autumn]

I was under presumption that EI was boosted by all % boosts, considering Absolute death and Analyze weakness boost the damage after EI is checked.