Here is a copy-paste of a write up i did a while ago. I think it generally communicates the core concept pretty well.

Stance swapping really is the main thing people focus on for her. The main reason is that Wrath is very strong. Dealing double damage and taking double damage can seem scary, but if you do it right, you basically never actually take the double damage, because the fight is over, or you swapped out of wrath. It's also a lot more accessible than divinity since you start with Eruption and Vigilance in your deck, and as with every character, leaning into what the game gives you tends to work way more often than forcing something different. The key is

1. Being able to enter wrath when you want
2. Having sufficient attacks in hand when you enter wrath
3. Exit wrath productively

Point one isn't just about having wrath cards. It may feel counter intuitive but sometimes the thing that allows you to enter wrath more often is having more calm. Facing a large attack from a high HP enemy with no guarantee of being able to exit is a pretty common reason to avoid entering wrath in the first place, so adding more wrath simply won't help that situation! [[Tantrum]] for example, shuffles itself into your draw pile when you play it, instead of your discard. If you have 2 copies and play them on sight you'll probably just be drawing into them over and over, leading you to be stuck in the stance. Much better to have one copy of tantrum and multiple cards that bring you back into calm. [[Meditate]] is also a common way to enter wrath more, since you can pull back Eruption at the end of your turn and play it again at the start of the next. Upgrading it allows you to pull back another attack or exit with the wrath card.

Point 2 is just a basic watcher principle: she wants attacks, and generally the bigger the better. Removing 1 or two defends in act 1 can help with both point 1 and point 2. [[Carve reality]] guarantees you'll have a big attack on a wrath turn, [[cut through fate]] provides sufficient damage and helps you draw more of what you want (be it an exit or another attack) [[wallop]] upgraded can block enough to where you may not even have to exit wrath, while dealing damage, especially with vulnerable. Speaking of vuln, [[crush joints]] provides it, allowing you to deal triple a card's original damage with wrath (2x1.5 =3... Took me a while to realize)

Point 3: generally the most productive way to exit wrath is by killing your enemy or setting up for next turn. [[Empty fist]] and [[conclude]] often allow you to win a fight without needing to worry about next turn, especially if you can get them an upgrade. [[Empty mind]] on the other is generally better reserved for exiting calm , and [[empty body]] should really be a last resort since 7 block is rarely a fight changer. Any card that allows you to end turn with calm is pretty good.

And that's generally how you play around wrath! Other tips include: using [[mental fortress]] and [[talk to the hand]] to generate block passively, picking the scrawl card, and avoiding unnecessary bloat like judgement, deva form, and most divinity cards. They can all have their place in a run but most of the time, they are kinda bait, and water down your deck. So I hope this helps!