This doesn't work for SSS monk apparently you don't understand how the build works.
Mythic rhythm doesn't work because it increases your SSS skill and not your EP you need exploding palm damage as much as possible.
That is the main damage dealer so % of EP, or Total amount of dmg increase also increases EP, but increasing your SSS doesn't work.
This is also why everyone else uses Determination, because it increases both Exploding Palm and Seven-sided-strike for 20% which is much more significant then only 40% damage boost of your SSS.
See it like this,
Weapon damage, Exploding palm impending doom 6305%
"Your seven sides strike detonates your exploding palm"
So lets see.. The Fist of Az'Turrasq = 12,610%
Lion's clawn instead of 7 hits now becomes 14 hits of 12.610% weapon damage.
With 15% EP on helm and boots it will be 30% increase on the skill meaning 6305% becomes 8196% and this gets doubled (Az'Turrasq) so 16393% weapon damage per hit.
Exploding palm is more important then SSS simply said SSS is just the Trigger to make EP go Kaboom.
now Mythic rhythm only works on your spirit spender... meaning your SSS since its the "trigger" and not the damage dealer.
This is why determination is much better because it increases the damage of EP by 20% of all damages including Exploding palm.
The more Exploding palm damage you can get the more damage you will start to deal this also counts for elemental in Uliana's case, it should be Cold.
Also if you use broken promises you lose 200% elemental damage which allows you to hit for 3~4 Billion per hit (so times 14) once every 16~20 seconds.
Also if you use broken promises, the amount of times that you non crit is too high compared to 51% crit hit chance. using broken promises is a simple and temporarily fix for not having Best in slot gear.
as soon as you get gloves, amulet, focus and restraint with CHC,CHD and CDR your golden.