Next Tuesday Ted will be toast. Even if he wins TX he won’t get any credit for it. Trump will win everything else and a good deal of the Texas delegates if he comes in second there.
You will see Cruz supporters who see the handwriting on the wall start to peel off for Trump and maybe a few for Rubio.
Cruz supporters are far too intelligent to ever ‘peel off’ for Trump as you put it.
The most we will ever do for Trump (and some of us won’t do that) is vote for him against Hillary.