But here is where we fall off that horse.... if we assume the number "30" is what is required to pop the threshold on CH, we already far ahead of that with a simple 3p, 3k, 7p. Changing it to 35 I don't believe makes it any different... it's still ahead of that.
In DoA4 the initial hit causing the stun did not reduce critical threshold, did it?
So the moves reducing the threshold are just 3K and 7P. Around 30Dmg for these two attacks with .6(?) dmg revision sounds reasonable imo.