Li Xiu: a 4* hero at her 3rd ascension.
Sha Ji: a 2* hero…
Seriously, ignore the healing that Sha Ji gives you. No matter how much HP all of your heroes regain from her, the additional health and defense that Li Xiu has over Sha Ji is probably a greater total in the end. …not to mention Li Xiu’s additional damage dealt. Also, you have a 3* healer… so forego the 2* altogether. My recommended team:
Balthazar - Ulmer - Li Xiu - Belith - Scarlett
In approximately that order (Balth & Scarlett on the edges). This is your best team. By far.
Also: FateWeavers has been amazing to me. Might be worth checking 'em out. We love active, talkative, and respectful peoples. 
Here’s the original recruitment thread that caught my attention.