Well, I hope it turns out well because I am likely using my boost on one!
Question for all you BM Monks out there - Let's say I am tanking a dungeon/raid and we're dealing with trash, maybe raid trash that can even hurt, but won't do lethal damage unless they have strong abilities.
If I was playing Guardian or Prot Warrior, I would use Iron Fur/Mark of Ursol or Ignore Pain/Spell Reflection, but as a Monk am I supposed to be as liberal with my Iron/Purify Brew charges, or rely more on my Stagger + Passives + Healers for those of situations?
I'll go over the basics of how a Brewmaster works.
Passive defenses:
You have no armor buff, but you do have a large stamina buff. I have 480k hp in Windwalker spec, and with the same gear as Brewmaster I have 756k (no stamina trinkets or flask). This stamina buff gets even more massive with your artifact.
You have 35% base stagger, but this is not damage reduction by itself! Without purifying, stagger doesn't reduce damage taken at all.
You have a dodge mastery that increases your dodge chance every time you take a hit, and then resetting after you dodge. So you are guaranteed to not get a bad luck streak of no dodges larger than a certain amount, based on mastery.
Gift of the Ox is an ability that spawns healing orbs when you take damage. You get one orb per MaxHealth damage taken, pre-stagger and absorbs. The HFC tier bonus gives a separate 5% orb spawn chance, and there is an artifact trait that spawns orbs when you go below 35% independent of the MaxHealth counter.
Celestial Fortune is our critical strike tanking mechanic, and it gives a chance equal to your critical strike chance that any heal on you with be copied for 65% on top of the base heal. This buffs heals from you or from healers
Active defenses:
Ironskin Brew and Purifying Brew. Ironskin Brew increases your staggered damage (meaning you taken even less damage initially), but it does not reduce your damage taken at all without purifying brew. You generally want to use Ironskin Brew and then purify around the time it expires to get a good amount of mitigation, but if you happened to not take much damage during that period you can save the charge and use Ironskin Brew again.
Managing Brew charges with good use of Keg Smash on CD and not energy capping
Picking up Gift of the Ox orbs, or using Expel Harm to grab them. There's a slight penalty (15 energy cost) to using Expel Harm, so ideally you want to pick them up by strafing
Breath of Fire (artifact required for the mitigation) with an artifact trait it reduces the damage the enemy does to you. Use on CD, but can take a talent (Blackout Combo) to increase the uptime with a little bit of extra rotational management.
Blackout Strike (artifact required for the mitigation) with an artifact trait reduces damage taken from the next auto-attack. Mostly a passive thing, but make sure to use this ability on CD.
TL;DR - passive stagger does no damage reduction, so don't rely on that. Make sure to at least be doing the ISB -> PB at the end technique to reduce your damage taken. If you are fighting an enemy that doesn't hit hard you can save your charges