This is gonna sound strange, but out of all those 200-600 ping matches I run into at my insane hours (my own fault really), my opinion is Squigly.
TL;DR - I think she has the fastest poke/ambigious mixup game to worry about, with high easily confirmable damage. I don't think that big band/fukua/filia/painwheel/whatever stuff other people hate today, can do mixups as safely or quickly.
If the other person knows what they're doing, they can just repeat divekick into stance-cancelled lows/throws with impunity. Those small gaps in the blockstrings are now completely nonexistent. The repeating normals means she can very quickly poke you out of any retaliation. It also means she can confirm combos even in heavy lag, and you eat 50% damage each combo. Each ambigious divekick also requires different timing to defend the next mixup, which means you're screwed in lag.
Daisy Pusher is not even punishable, much less reactable, with that much lag. SBO punishes buttons or directions in neutral, that you pressed 10f ago. Both lead to full combos. On top of that, you have to deal with drag'n'bite or cremation assist mixups to even *get* to her half of the time.
All that having been said, fighting anything really sucks in lag. Just about any kind of pressure pattern is totally impossible when you're playing too far behind to block or punish anything anymore and all of your moves are suddenly -20f.
Edit: Oh dang I didn't even realize who made the thread. lol awkward.