Unbreakable Xrays:
Instant Air Xray (iAX)
aaFan, iAF, Fan, iAX - 45% I think
aaFan, iAF, Xray
aaiAF, Fan, iAX
aa2~Fan, iAF, Xray
And I think you can do this as well, but not tested:
aa2~Fan, iAF, Fan, iAX - Close to 50% unbreakable
You are doing 52% in the corner where you can get 48-52% already with no meter. I see it's use if your opponent is close to death and almost has a breaker though.