2012-11-08, 01:18 PM
Life steal is for auto attacks. Spell vamp is for all other damage. Even spells that do physical damage proc spell vamp. All magic damage (including item damage) procs spell vamp.
That said, spell vamp is mostly useless on Amumu. Spell vamp is reduced by 67% on anything that isn't a single target spell.
That said, spell vamp is mostly useless on Amumu. Spell vamp is reduced by 67% on anything that isn't a single target spell.