I asked this earlier but the only answer I got required the QR seal which I already have on my legendary Tiki. My Myrrh is HP+ def- which sucks but I'm hoping to get another soon
I have a -Def too so I feel you. I am fine with VF for now. An extra SF would work well on her, but without a QR seal she may not retaliate with mid speeds (28+) since yours is speed 23 unmitigated. Something to consider
I guess it would depend on how you use her. If she’s on a team with a lot of buffs to work with then special fighter would be the way to go as her defense will negate her poor speed, but if you tend to solo her then vengeful fighter is a good fit.