That just depends on your team, as long as you already have a Frame B Debuff (Most Himes that do have it better than Mordred's) You'll find her completely useless, just unlocking her for Black Propaganda, note those aren't debuffs, they're just afflictions with 2 poor Frame B Debuffs, the affliction resistance is only useful in X raid like Yatagarasu

Andromeda is a wrecked ship, most of the times the Raid killing her first so you don't even get to use the Resurrect skill, Unlocking her is just for people/attributes lacking healer, for example she's pretty good for Thunder this event, all souls have their use depending on the raid, you shouldn't just go for one without thinking what you're lacking, if nothing then your soul might be Joan or Arthur