1) 2hander dmg bonus scales up with level. The higher level you are the more advantageous the 2h dmg bonus to 1 handed.
2) Monks triple attack mainhand at 60. I trust that most posters here are smart enough to see how this tips the scales massively in favor of 2hand weapons.
3) Thanks for a 2-3 minute parse on a level 52 monk? You successfully provided parses of woefully insufficient length on a low level scrub and want to extrapolate that to the performance of level 60 monks?
Lol
https://lucy.allakhazam.com/dmgbonus.html?setcookie=1
Monk primary dmg bonus at level 52 for 1handers: 9
Monk primary damage bonus at level 60 for 1handers: 11
IFS (40 delay) dmg bonus at level 52: 18
IFS (40 delay) dmg bonus at level 60: 34
So for the 1hander you had a 22% bump in dmg bonus 52 vs 60
For IFS there is an 89% bump in dmg bonus 52 vs 60
Lol
Level up to 60 and try again?