Well razor draws aggro, making you get hit more. On elites you have to pot, there's nothing in the world that is going to change that, and there shouldn't be. However, with a normal elite build (especially including aoe nox), the heal can mean the difference between a lb pure time and dying and having to run from the start again. The bush proc is useless for PvE especially, so the heal return is the only real "proc" the bow has.