mikene uses outside of db10?

in db10 used to run a lumi(L), vero, kona, bella, atenai team which was sort of safe (no resser tho) albeit a little slow.

i fused a mikene and switched to sig(L), kona, bella, vero, mikene but mikene being my only 5* in the team, she dies. A LOT.

her stats without sig lead are: 13k HP, 800 def, 138 spd on violent/blade(63% cr)

i was wondering if i should switch her runes around for more tankiness and less critrate/spd (currently spd, def, hp) or if it's necessary to 6* her.. and considering i don't like to 6* stuff for one sole purpose, i was wondering if she's used anywhere outside of db10. i know some people use her as a resser for toaH and HoHs but that still seems kinda bland.

PS: why on earth does she never cast soul protection on herself?? would make my runs considerably more succesful