Doesn't hurt trying the stuff that hasn't actually been tried. Well might hurt Loa and Shaw so maybe not those.
Being unstoppable doesn't in itself mean you can't be slowed down by time manipulation. Probably.

But obviously none of these things will work because of the demands of the story. But it would be nice to see all of it tried.
Gotta say it's pretty cool though that they have shown so many varied attempts in the book already. It makes sense and is cool to see.