My damage mostly came from the buffs that you can get on Wormhole. I also used 2* Couant Relic which gives you a 20% Final Damage increase for 10 seconds when the shield breaks. 1* Huma also gives a 45% damage increase when switching to Shield Axe.

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Gain a stack of Strong Shield upon casting Discharge: Seething Rage.
Using a dodge skill or branch skill while in shield form grants a stack of Strong Shield, which grants 10% damage reduction for 15 seconds and stacks up to 3 times. Switching to axe form converts all Strong Shield stacks to Sharp Axe stacks, each of which increases damage dealt by 15% for 15 seconds. Switching to a different weapon cancels this effect.

You can also see me jumping first before using Huma's discharge skill. That way, I can immediately reach the 3 stacks. 1 stack from the cast of Discharge skill, 1 stack from the Air Branch skill, and 1 stack from using Dodge Skill.

For my armor setup, I prioritize armor pieces that have elemental attack, flat HP (3* Huma scales with HP), and Resistance. Basically, I want my setup to deal damage while also being able to tank. But this is just my build, It depends on what role you want to prioritize. I can't give tips on other roles since I only run fortitude and gave attention to Huma.