You definitely need two torx bits. The six-pointers should be readily obtainable though.
Regarding the blade swap,
Good news:
The Surge bit holder and the Blast phillips are the same thickness.
They also have the same size pivot hole, and same size locking notch.
I
think the Blast phillips would clear the Surge plier head. When folded up it slants in against the back of the handle, which seems like it gets underneath where the plier jaw folds to.
Not so good news:
The Blast phillips is a skosh too long. It will hit the little tab where the Surge pliers rest. (see red line below) This could be remedied by grinding back the rest tab halfway though.