Hmm... I guess the BST ability could be useful for a free RR. Just call out a Silas right when you enter a zone then absorb it for RR. If you're in Abyssea you could do it right when you enter the zone, grab buffs, Atmas, then get to camp and Call Beast would be ready again.

The ability isn't exactly ideal, or even really wanted by the BST fanbase, but it's better than nothing I guess. I would have preferred a Call Beast ability that summoned an HNM to do some uber attack then disappear. Like Odin and Alexander.