I levelled a lot of gems and farmed a lot of gr keys with this build in the past and in 2.6.1 it became so much stronger!.
Very fast in solo and group.
Keep in mind it's a SPEEDFARMING build and not a GR push build, so they key is to kill everything fast and move as fast as possible.
If you can't kill everything in 1-2 blow because of low paragon/low damage/etc then just lower the difficulty. Not need to frustrate yourself and crawl through high tier content slowly.
I do T13 in about 2,5-3,5 minutes at p1500 and no augments and 1,8 mill damage.
What i like about monk in general is that he's very flexible with skills. You can stack a tonn of damage or you can stack a lot of toughness, or a mix of both.
I will describe a few options and combinations of skills.
Why no Cyclone Strike - IMPLOSION by default?
It's a very spirit-hungry skill. If you will spam it along with seven-sided strike, you will be out of spirit pretty fast, and you don't really want to spend a lot of time "generating" spirit. During my runs i realized i don't really need implosion at all most of the times and switched to extra mantra for damage.
Why no Gungdo Gear by default?
Not really needed since we are supposed to kill everything from single cast of Seven Sided Strike and it applies EP everytime it hits (through Madstone). Extra spawned elites in rifts = more globes-> faster progression -> more loot.
Passives: Guardian's Path, Resolve, Sixth Sense, Harmony, Near Death Experience
Active Skills: Breath of Heaven: Circle of Life, Mystic Ally - Earth Ally, Mantra of Healing - Heavenly Body
Active Skills: Dashing Strike - Radiance, Breath of Heaven - Blazing Wrath, Mantra of Conviction - Overawe, Mystic Ally - Fire Ally
Passives: Exalted Soul
Active Skills: Fist of Thunder - Quickening, Sweeping Wind - Inner Storm, Mystic Ally - Air Ally
Passives: Fleet Footed
Active Skills: Dashing Strike - Way of the Falling Star, Way of the Hundred Fists - Blazing Fists, Mantra of Salvation - Wind Through the Reeds