Tweak for Drain Essence please?

I really do like the skill, but the fact that I have to hover my mouse over an enemy to affect any enemy makes it feel way weaker than flame torrent (which I consider to be a very similar skill). Is there any way to make it auto target the enemy closest to you cursor (or within a range from your cursor)? It would save me a lot of trouble with having to constantly hovering over each individual mob in a pack of mobs.

It’s really great for dps on a single target, & still great for clearing packs with how easily it kills trash mobs, but you miss out on so much dps in comparison to your skeletons because you have to directly hover over an enemy with your cursor (which my army kills before I get to). I just feel like I’m not actively assisting my army (which is what I was intending to do, & why I switched from Drain Essence to having a one hand melee & off-hand with auras on auras on auras, & weapon proc skills).