I am leveling and building my Witchblade (75+lvl). So far i have 12% lifesteal (Lifegiver Signet and Black Star of Deceit). My 1h weapon enchant slot is empty and i cant decide between Haunted Steel (8% lifesteal) and Oleron’s Blood (more dmg). I can also pick 3% lifesteal from devotion (3 free points into Unknow Soldier, but dont prefer it).
So options could be:
20% lifesteal (Lifegiver, Black Star, Haunted Steel)
13% lifesteal (Black Star, Haunted Steel and free slot - ring of choice)
12% lifesteal (Lifegiver, Black Star and Oleron’s Blood)
It depends of your max hp and damage, how quickly you can fill your health bar. One of my heroes is running with 3% attack damage converted to health. More would be quite useless since my health is maxed quite quickly even with that value. But one other hero is running with 12% and that is a comfortable value for him.