https://www.icy-veins.com/d3/monk-leveling-build-guide
https://www.icy-veins.com/d3/monk-leveling-and-fresh-70-guide

Helm: Flawless Royal Diamond (or highest available)
Torso: Flawless Royal Emerald (or highest available)
Pants: Flawless Royal Emerald (or highest available)
Weapon: Flawless Royal Emerald (or highest available)

• Bane of the Trapped — staple multiplicative damage increase. The gem will proc itself with its level 25 property in melee range (where most Monk builds fight), or through item effects like the slow from Pinto's Pride Pinto's Pride.
• Bane of the Stricken — almost mandatory gem for Greater Rift progression, as it is designed to whittle down the scaling health numbers of monsters with a percentage-based increase on successive attacks.
• Boon of the Hoarder — synergizing with other farming mainstays like Avarice Band Avarice Band and Goldwrap Goldwrap, this gem will not only keep you rich, but also sped up and safe during normal rift farming.
• Bane of the Powerful — the speedfarm counterpart to Bane of the Stricken Bane of the Stricken, Bane of the Powerful Bane of the Powerful offers a solid overall damage and survivability increase as long as your killing speed does not fall behind the timer of the gem.

Situational gems

• Simplicity's Strength is crucial to any primary-skill dominant build, like Shenlong/Raiment specs.
• Enforcer is a priority gem for Ally-centric builds.
• Gogok of Swiftness is part of cooldown-centric setups like Uliana's Seven-Sided Strike Seven-Sided Strike.
• Zei's Stone of Vengeance is included in the ranged Wave of Light Wave of Light Sunwuko builds.

Flying Dragon
x Balance
x Incense Torch of the Grand Temple
x The Flow of Eternity
x Crystal Fist
Kyoshiro's Blade
x Lion's Claw
x Rabid Strike
Scarbringer
The Fist of Az'Turrasq
x Vengeful Wind
x Won Khim Lau
x In-geom
x The Furnace
x Envious Blade

x Cindercoat
x Depth Diggers
x Lefebvre's Soliloquy (Shoulder)
x Bindings of the Lesser Gods
x Cesar's Memento
Spirit Guards (Bracers)
x Gungdo Gear
x Nemesis Bracers
x Goldwrap

x Convention of Elements
x Unity
x Avarice Band (Act 3 Bounty)
x Ring of Royal Grandeur