Here? It was just a good example of both. But generally I think it needs an adjustment (also Ghoul). But that is unrelated to this OP.
I found this post, which is not the discussion I was seeking but it does indicate that %WD is included in the leech. So thanks for your clarification to that. I’ll keep looking for that other discussion when I’m motivated, though.
ADCTH works for whole direct damage, caused by skill (both Weapon Damage and flat damage added by skill itself). However, ADCTH added not by skill itself (i.e. on items, etc) is penaltized if skill deals less than 100% Weapon Damage (accordingly to % Weapon Damage). If skill doesnt deal any Weapon Damage (so Weapon damage = 0%), ADCTH “multiplier” for it will be 0% as well (except ADCTH added by skill itself - it is always in effect at 100% power).
DoT damage types (bleed, burn, etc) dont count for ADCTH.