I'd say step one is to mark the targets. You can make a macro so you mark <1> on the target you shield lob. Then do the steps others have mentioned involving Flash in order to keep hate off your healer. If a DPS targets something other than your marked monster, and they pull hate? Fuck 'em.

Oh, and also make sure to upgrade your weapon as first priority. Higher damage means more enmity, not just from your savage blade combo but also from Flash.