The DPS in Trixion with the new explotion tripod show a little drop of DPS compare with the doomsday and seraphic hail variants. I wouldn’t drop reverse gravity. This is one of the main DPS skills. Drop seraphic hail or frost call. Or drop the counter, take the shield for mana burning and change frost call for explotion. And at the end if you miss with reverse gravity you will miss with explosion as well. Both are melee range skills.