KineticClash
[10] Knight
Why?
Well, 2K will duck punish SET BBB and 6B8 will interrupt the last hit (trades). 9B will get you out of most SET 6B+K set ups. 214B is not punishable by Viola. I think she only gets about 25 damage from punishing 1K. It's very easy to space her with Ivy. And Ivy actually does have a better range game IMO. It's probably not a HUGE advantage because of Viola's massive damage potential, but I think it's still a tiny bit in Ivy's favor. It's actually just a pretty strange MU if you think about it.
Also, Viola does not have 50/50 ToDs because SET 6B+K > 1K > B+K BE only (and rarely) combos near walls. The general rule is not to duck during her SET 6B+K