He should skip, and so should Cruz. We’ve had enough debates, the candidates are well known in their positions.
At this point, the odds of earning new voters is heavily outweighed by the chance of making a gaffe and losing voters. Kasich will desperately want a debate, because a slip by either Trump or Cruz would give him a bump in the polls.
But strategically from Trump and Cruz’s positions, it makes no sense to debate anymore.
Then let Kasich do a townhall with a FOX audience by himself. After about fifteen minutes the FOX execs will wonder if they paid for a Sominex infomercial when the entire audience is sound asleep.