Yeah I'd get a bit of use out of this actually. Most of the time just using /recast in the strategem macros themselves is enough for me. I'm thinking of Immanence though, where' I'll occasionally check remaining strats manually or by typing /recast so I don't waste the first one only to find out that I can't use a second one.

You can also put /recast in a separate macro, but I don't have enough space to justify it.