Notes from author
This is supposed to mimic Yang's fighting style. I opted to Power Within for her semblance Burn. I know it's not exact, but you work with what you have, plus cool pyromancy. Great fireball is there just for ranged attack and also because we don't have guns. (Insert sad Bloodborne music.) I picked Fire Tempest because cool pyromancy. That's it. Also because I figured just using raw fists will eventually get boring. I picked the brass armour set because I thought it might fit her in a medieval aesthetic, and also because Lordran hasn't invented jeans and jacket yet. Ring of Favour for the extra stamina. Red Tearstone for the extra damage and also because IDK what else to put. As you can tell, Vitality, strength, and dexterity should be your main stat. I recommend you to level them up together whenever possible. Endurance isn't as important unless you get to 55, by then you can fast roll. With attunement there's not much to be done since you started with pyromancer.
This is just here for my dumbass self when I forget.
Change it depending on the situation.
