Usage can change wildly depending on key level, the healer you have, and the pull.
The general idea of it is, brew gets increased healing taken because of crit, allowing you to take more damage. Stagger allows brew to be squishy (low armor) and take a ton of DMG without being outright one shot like a bdk who lost bone shield. Then the increased healing matches the increased dmg.
So basically you can let stagger rot as long as maintenance healing from yourself and the healer can sustain it then purify when you need to cool things off. For most cases. Think of it as you’re constantly melting to varying degrees and your job is to just stabilize it when needed.
Conversely when doing higher keys where dmg intake is huge, you constantly get stagger equal to 100-200% of your max health, then purifying is not only “death striking” a massive amount of staggered dmg, but also actually death striking and healing your HP pool a large amount. So stagger becomes a resource you can heal off of.
You then also start to accumulate lots of little sources of sustain based on taking more damage. Orbs proccing based off dmg intake, doubling if expelling at low HP.
You start proccing elixir of determination more often, and gets bigger based on bigger purifies.
You get more celestial brew stacks from purifying red often.
The lower HP you get and/or higher key level you go the more Ox Stance charges get consumed to stagger more.
Training of Niuzao starts sitting at max more often, increasing attack power by a large amount meaning even bigger celestial brews, orbs and vivify’s, etc. You really feel the struggle when starved of stagger.
Assuming you have solid maintenance healing from a healer and dmg intake is fairly high/moderate I would go by this:
- let stagger sit red (60% minimum) for mastery boost
- purify if on 2 charges and know you won’t be in danger soon, ideally wait til 100-120% stagger so you can stay at minimum red when purifying (purifying on 2 charges gives special delivery dmg and gets brew CDR value)
- celestial brew when an expected spike of DMG will happen to buffer it
- purify right after spikes of DMG
- pop defensive for spikes of DMG if you actually need to (more of a higher key thing)
- pop defensives typically for on pull because that’s when it’s most dangerous
- expel 5 orbs when low HP and/or after spikes of dmg
With reliable incoming healing, you don’t need to panic purify even when you’re over 100% stagger. You can assess the situation and if it’s safely sustained you can wait until it gets too intense then cool it off with purify.
The goal with this is to allow yourself to rot from stagger safely and get a dmg/healing boost from it, and using the bullet list above to smooth out dmg spikes and make yourself an extremely smooth/stable tank to heal. Think of it like you’re actively parrying/blocking dmg.
A big however though: there is a phenomenon where at lower keys 8 and below let’s say. You rely way more on flat healing and external healing because your dmg intake isn’t high or fast enough to get a fat stagger pool to heal off of.
When stagger is consistently huge you become like a blood dk and gain a ton of self sustain. When deprived of high stagger, your sustain becomes really weak and you just need external healing to love, and start putting CB and vivify on cooldown and efficiently use orbs.
For example: I tanked a massive tank dmg pull in dawnbreaker 13, when healer died for whatever reason, I’m still sustaining myself completely til they come back, I don’t actually need that a ton of external healing
When I go to solo m0, suddenly I’m struggling to keep myself up and it’s ironically kind of harder.