What exactly are you saving this strategem for (which is regained in 30sec)? You use this strategem at the same time your BRDs/CORs are rotating. Nothing is going to require two strategem uses within the first 30sec of a fight... so just use it like it's meant to be used.
Also, you're not saving any time because this is pre-start, and you're not saving any MP because you refresh to full on VW start... or you auto-refresh/refresh-effect it back over time. Really, are you trying to say that "Protect"-ing your party is a waste of MP?