I'd like to discuss Cyrax's meta here (much also applies to Triborg in general).
There is no gap in between D4-chestsaw (non-enhanced) on block, AND chestsaw is safe against the entire cast except Reptile's ex-slippery slide.
Against Reptile, D4-(ex)chestsaw is safe.
-D4 on hit jails into F13
-D4 on hit jails into 111 with a small run cancel
The following should be true against the entire cast except Reptile's ex-slipper slide (varies on string). If someone else could verify this, I'd appreciate it.
-111 on block is completely safe, UNLESS you cancel into any special. There's a gap that can be armored through at 111(gap)armored reversal.
*If you hit 111 from a little far, there is a gap in 1(1) they can armor through
-F131-chestsaw on block is completely safe
-F13 on block is completely safe (F131 is not safe)
-B1 overhead on block is completely safe
-21 on block is safe, but bad range
-B3 on block only safe from a distance
-F211 on block is completely safe
-F43 on block is safe, but there's a gap in F4(gap)3. On block, you can cancel F43 into teleport.
Cyrax definitely feels quite clunky. I really just wish his ex-AA had armor.