Positioning in this game is client-sided, which means: As soon, as You start a cast, Your client tells the server "dude, im already out of that shit" -> shazam, no damage.
(Notice: We are currently trying Turn 4 - not on Titan anymore )

Why do I suggest this? :
In the scenes, where Twintania casts Twister, we have never seen someone use an ability for this updating-position purpose. This is why we, and especially I believe, that if it is a lagging problem, it is because that positions are not updated properly, due to lag or not casting the immediate second after the Twister cast finishes.

One question I have is:
Do always all players die, if it is a killing twister, or have there been scenarios, where just 1 person died?

Furthermore:
I have many more ideas on how the fight might work, but I can't really test them myself, as I haven't reached it yet.. :/