If you swap 1 and ib you use ib during unchained and 1 is used without unchained. No go. You could move ir forward 1 gcd and loose it on the 1st unchained eye but gain it on the zerked ib. That's probably worth doing.

Swapping ib would be bad though with the unchained timing. It's a bridge between unchained and defiance off.