236A is airtight from C moves and is -1/2 on block, not sure, and becomes + further away
236B is a frametrap from C moves, and is +1 or so on block, from longer ranges, the advantage is slightly better. These will also both catch jumps, and both are air unblockable.
22A whiffs crouchers, but will catch jumps and is very + on block. Too unsafe on whiff though...
The idea I'm getting at is 236A/236B are very good moves to throw into pressure strings. iirc 236A is a frametrap off of B normals.
Also, remember the nin combo, 2A 5B 2C 5C 623B j8.CB ad.B sdj.BC 2C, it's ~100 more damage. Also, always try to hit 2C then 5C, 5C has relative prorate and will drop about 100 damage off your combo if you do it first. Don't drop 5C entirely though, even with relative prorate combos are still better with it.
If 236A/B counterhit, you can usually hit a 5B 623B airstring.