Outofspace
Sogeking / Deeps
I haven't personally done any testing on it to know for sure, but from what I've seen poisons are a flat proc chance independent of weapon speed (vs. the ppm system that does scale with it)
Some calculations from @Shmuckumpoo in discord awhile back ended up pointing toward an extra 5-6 crippling procs per minute with vendetta OH vs Outlaw Sabre.
View attachment 15698
Very interesting, that looks like good data. My initial research does suggest that specifically Crippling is a flat proc chance, while at least Instant Poison is still on the PPM system.