I'll go for that if Trump can/will run third party. But you can't "pledge" your delegates, so losing Trump out of the race to a third party would absolutely decimate Cruz' chances at all. He would have 0% unless he could beat Kasich somehow to get to 1237.
What can Cruz or Trump people do? Where can we go? We vote for Ryan or Mittens or who ever they select or it goes to Hillary. I say we call bolt the party and vote 3rd party to help wreck the GOPe. We can’t be forced to support the GOPe just because we do not like Hillary or Sanders. Maybe a Commie would be a good choice—4 years of his misrule will make Obama look lke a savant.