But it takes an action to drink a potion, does it not? And that would also require hands?
It seems to me that the OP is making use of creatively applied game mechanics to achieve the "good stuff", but appears to rely on "narrative" where the game mechanics are inconvenient.
I'm sure the GM would allow that, though. But it must be a bit demotivating for the players to have this great plan for unleashing unparalleled destruction, and have the GM "allow it" instead of being forced to accept it.
-DF