The problem with Andromeda is that if your debuffs miss, the extra healing won't matter. You're going to die to concentrated fire. Mordred is indispensable for most teams in solo content right now.
I guess You missed something important...
Originally Posted by Alvin Ramos
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I already have Arthur and Mordred...
And don't forget that there are also Union Events. If someone is using Mordred, someone else may use Andromeda...