So, strange question about a pretty non-consequential fight, but does anyone else do strategy for A1 Faust?

This week getting my drop from A1 Story Mode, I was greeted with a lot of toxicity for splitting up heals between the MT/OT between healers. Healer A on Tank A, Healer B on Tank B, ideally never having to overlap our heals so that both of us (White Mages) could effectively do DPS + healing on our specified target.


The white mage acted astounded at the idea of splitting heals, stating that it "Wasn't required for this fight" and that it was a waste of time.

The bard decided to take it personally, saying it was the stupidest thing he'd ever heard, and that likewise he as a main healer would never split it up like that because "If tank B is at 10%, are you not going to heal him?"

So I'm hoping for some clarification - is this strategy overthinking it? Is there a more optimized strategy that people tend to use? I would welcome any advice/thoughts on this, as I only do healing on my alt - not my main. c: