it is useless,longer animation than one normal skill(i cant count the number of times that i have been hit by aoe because this useless skill)and bad damage(with the 50% bonus damage it is bad damage also)
I only use it when i have tp problems because it is free and have so long animation that it give me time to regen tp.
we should be inmune while we cast jumps or the animations shloud be the double or triple fast