What’s the best way to use endless hail at the start of a fight? Should I launch it at distant target or over the top me so that a distant target charges into it?

On my Dragonknight I have been starting most combat with an Endless Hail, Poison Injection, Flames of Oblivion and Weapon Swap. It works well. Most mobs are pretty dinged up by the time they get to me. Only they are I also usually out of the endless hail. I’m wondering if I should do things differently? Sometimes I kite the mobs back to the endless hail. So too I sometimes launch it over where I think they will be rather than where they are. What is best?