Healing 300 to 1000 damage per auto attack is totally balanced
Warlords 1-20% lifesteal
cos we need 30% more lifesteal
because we need crit
Because lets face it whats more satisfying then having a passive negate over 9000 of tanks spent gold
Depending on current health, who you are attacking and wheter you crit or not, you will heal anywhere from 300-1000 health per auto attack
yes thats right 300 to a 1000 health every auto attack
Meanwhile
Rito: 
is a problem, we are removing spellvamp because it isnt balanced
