What're your thoughts on Holiday Shalem instead of Arulu? I've seen some interesting-looking setups. I do recall you mentioning you didn't have a chance to pick her up, but at least in theory would she be an upgrade/make omens easier?
burn all her stacks and she'll die a few turns later thanks to her -50% DEF demerit. The faster she dies the better. gbf.wiki/Lamretta_(SSR) Remember to have her with ATK awakening to reduce her Max HP.
Nope. Lobelia is far better in this comp. 30% skill dmg cap and 50k skill supplemental. And Olivia needs 12 buffs to activate her passive which Lobelia contributes towards