Getting Luocha for Blade already having Huohuo and Fu Xuan

How you feel about having 3 5* sustains? I use my Fu Xuan on mono quantum team and I feel the need of SP when playing with Huohuo and Blade (cause e0 bronya skill). Should I get Luocha for an easier time or there is a way to make huohuo more positive with Blade?

edit: Thank you for the help, I will go for him on his rerun, I think he will be more comfortable to play and I really like him as a character!