Izanami basic attacks count as AOE attacks with life steal only being 33% efficient. Basic attacks also don’t scale to 100% on every hit, 80/20 is the ratio. Time for some maths on how much life steal you gain.
100 = physical power.
10% lifesteal
x = 33% coefficient
80 ÷ 10% – x2 = 4.8
20 ÷ 10% – x2 = 1.32
4.8+1.32 = 61.2
38.8% less compared to other hunters