Hello, could you give me your opinion on elite soul choice please?

This is my team for now: (+Sol who can replace Nike at times)
Kamihime General Discussion + Q&A-capture.png

I usually like running with 2 healers so im leaning toward going for Andromeda and D'Artagnan later on as it seem to be the go to 2nd soul in most cases for effective farming.

Best choices for a 1st soul are between Andromeda, Mordred and Arthur (i think), is there one of these better for my setup? I kinda want Andromeda (for the look mostly and i like healer) but since my team is lacking debufss, Mordred is maybe a better choice? Also maybe i should swap a R for Sol and go with an attack soul like Arthur for more sustainable dmg? Im looking for long term usefulness so kinda lost on this.. any opinion appreciated.