Leap slam spark bug

No they spam leap slam. And one doesn't win in melee range with arc, as you probably know (I play basically your build). They literally leap slam as their attack, which makes any form of traps not work (no CC), unless I'm mistaken.

Or

This is a known bug for a long time. Some ground targeted effects don't have an effect on you if you stand still after leap slamming. You can try this out in a map with burning ground. If you leap onto the ground you will not burn, but you will start to burn as soon as you move.

I always carry a leap slam gem with me when I do the Academy map boss, so i can stand in his tornados without being damaged.