I think this node is bugged, when I was testing damage done it didn’t matter whether I had 0 points or 5 points. I tested it on 5% HP, (66/1316), so 95% HP is missing, with 5 points in node it should grant 158% increased damage: (95/3) * 5 = 158.
The difference in damage stats tab is 8% dmg between 0 points and 5 points and effective damage done to training dummy was not existent.
Does it work as intended or am I missing something? Right now it looks like this node is waste of points and only blocks other nodes.