It's a daunting task but I know this is the next step in leveling up my game. I feel like I have to ability to get pretty good at SCV. I guess I'll just have to start with my bad match-ups and work my way up from there.
Personally, I find Nightmare to be one of the best match-ups for Xiba. But that's probably just me. Anytime I anticipate Grim Stride I stuff him with 6B+K and when ever he goes into NSS I use 4B which beats out all of his options there except A+B and even beats that out at certain distances...