Okay, since 48%|40% is ambiguous, here's ways of interpreting it:
48%|40% of max HP removed from current HP (what I thought)
48%|40% of max HP removed from max HP (this interpretation seems more difficult to weigh for me, and the values would definitely need to be lowered)
48%|40% of current HP removed from current HP (worst idea ever)
& for completeness, 48%|40% of current HP removed from max HP (this doesn't even make sense)
So there's really only a and b. a nerfs SoV, b buffs it. SoV
already do okay against SoSa with Vamps+Steal
I'm don't know how to reason about b. Lowering the cost of future SoSas makes it confusing. If maxHP lowers by 40 when one has less than 40 current HP, does it kill? SoV logic says no. It mostly seems like an attempt to nerf SoSa by making one unable to store the damage to go a round without chaining another SoSa, a decision I feel is critical to making SoSa require critical thinking
PS the idea isn't my own creativity, I based it off of someone's suggestion to buff SoV to reduce maxHP by a % (with a flat minimum) rather than a flat amount