Domitia or Second Sartana to lvl up
I like Dom tbh. She hits pretty hard and debuffs.
Both are good but variety helps and both have good costumes if you are ever lucky enough to get them.
I maxed my second Sartana before Domitia, but Domitia before I’d do a third Sartana. But then I got Seshat and Kage as dark dispellers, without those I’d probably have maxed Domitia with higher priority.
It depends if you need the dispel from Domitia as mentioned above . While not a reason in and of itself her boost to yellow D can be helpful too if you stack colors. Domitia is sturdier too of that’s been a problem.