User blog comment:Double Slap/Zara, The Cryptic King/@comment-26203093-20161005203435/@comment-26203093-20161006114504

Well, why should it stack? it constantly being reapplied should be enough power for the ability. On the one hand it solidifies that they shouldn't stand next to each other, on the other hand, they can't get away from each other anymore - and at 3.6, or 3.3 cooldown, you only need to hit 2 targets to spam it. He has a ludicrous cdr scaling above anything else, and so he power spikes at 40% cdr, which is simple enough.

400 radius is about the size of a lane which is achieved at 150 MR. the fact that he basically doesn't scale at all with offensive stats means he can just pour points into those stats. If he cooperates with even a moderately good engage team, placing a rune behind their team from 1000 range that covers the majority of river, cuts off escape options thoroughly and creates 'damned if you do, damned if you don't' situations. Let's say he gets 250 MR. That's now auto attack range for some. 300, auto attack range for most. 350. He's zoning everyone but caitlyn, and doesn't have to use it to teleport, just place it ontop of his team. and he can do this every 3.3/3.6 seconds plus 2 with channeling.