I think in truth, actually swapping positions with an opponent isn't going to be that useful. A spellslinger fighting a melee opponent is still going to be in melee range. To actually swap someone off a cliff will require a cliff and perfect timing. The best and most common use I can think of would be in putting opponents in another opponents telegraph. It would also be interesting if the spellslinger could also use this ability on allies. There would be a lot of potential abuse from it, but it would allow say a spellslinger to sacrifice themselves to pull someone out of a telegraph. Or even to move defeated players around.