The only monk I have on p99 is 13. Take this with a grain of salt
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I expect most of the high/low AC discussion was prior to the scaling damage bonus for 2h's on blue. A t-staff for example was amazing due to ratio but with a 11 dmg bonus the spread of it's hits was worse than it is these days. This was especially bad with slower ones like the IFS.
Now the damage bonus at lvl 60 on an IFS should be around 36 which would be like the epic fist having a damage bonus of about 14 instead of the current 11. Combine this with triple attack and while a 2h may have a wider spectrum of dps when it's cruising at full clock it can put out some really impressive numbers. At least I guess until you get into the rarified BIS items; Dharns and primal vs Abashi? I don't know these things but both are insanity on the damage meters.