Battle mage guide

On the whole blood buff argument I'm pretty sure that 1% of your dmg will be 10% of your max hp especially when you are mobing

Given that it appears to be your base max hp (+hp gear, even with raw numbers and not %s, doesn't factor in) you definitely will eventually, even single target. I still chose to do 5/18 though, and at 2% im almost always hitting my max drain (unless I'm tele'ing through a single target to finish a mob or something). I have booster/drain macro'd and recast both when drain ends anyways, so even if I were in a situation where I'd want to hold off recasting for a handful of seconds, my booster will still last long enough for me to do that. Drain is great, but with the limit being on base max hp (I haven't bothered to put a point into conversion so I don't know if this will somehow be free from the general rule and work for drain, but I highly doubt it) anything beyond 2% is pointless.