Since I have Guild Milla, I went ahead and level'ed BO a little on Tasia. The result: no damage from sub, obviously, but I was a walking mini megiverse with Heal Share and that Deband atk PP combined with atk pp restore is insane regen.
That's about it, I didn't dig further, but a rainbow palette of TMG get more damage from BO than TE sub. Utility wise, both have it's up.
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