I'm surprised to hear that. I got a Tzo Krin recently but figured the bot wouldn't handle it properly.
Which fire build are you referring to?
I sent this to Epistane but I'll post it here, hope it helps.
Yes I play a fire monk right now while lightning is screwed. Use SWK shoulder, ammy,and gloves/Captain Crimson belt, pants/Crudest Boots, Tzo's Gaze, Torch, RoRG, and Unity or SoJ, also Reapers for bracers. Use Zei's, Trapped, and Powerful legendary gems
Skills: Dash that gives you the 40% runspeed after using the first rune...it's holy (right mouse)
Fire Bells (Left Mouse)
Sweeping Wind the spirit regen one (button 1)
Epiphany the spirit regen to 45% one (button 2)
Mantra of Conviction the one that gives runspeed after kill (button 3)
Mystic Ally Air Ally for spirit regen (button 4)
Passives: Beacon of Ytar, Seize the initiative, Momentum, and Fleetfooted
You basically dash around till you spot mobs start Sweeping wind, Hold shift + spam bells, dash or run very quickly to next pack. Try to keep SW at three stacks for mana regen. Pop Mystic ally when spirit is low. Use epiphany on cooldown or save for elite packs depending on CDR. You can fly around T6 like that blowing shit up and the bot does it well if you make the bells ranged. Search the monkcombat.cs for Wave of Light section and where it says 16f for cast distance replace that with wolRange. Now it'll cast up to 55f away.
You don't need to hit mantra but it can be a dps boost if mobs are close to you. You'll be a bit squishier than lightning build but since you hold stuff at bay it's no biggy. I did a Grift 36 like that. But as lightning I can do in the 40s easily.
Hope that helps, sorry I couldn't remember the names of the runes but you should find them easily enough from the description.