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Tbh the point is if you're using Blue you won't be needing those extra potions from Skyla. Blue's gauge boost even at 1/5 should last even a long battle if timed right plus having Gauge refresh on all three pairs mitigates waiting for Red's BBrrrrrr. Plus Leaf's Mega healing will be working full time since you'll be spamming moves anyways so damage isn't a problem. Having Blue's sync move proc an Endure on the whole team prevents you from getting fucked over and having Leaf's potion handy will save you at that point.
I've tested it on Cyrus and Legends Full Force Battle and Latios. It just goes unga bunga after the first sync and does not stop at all.