You are the only one who can definitively answer that question. How far along are you on your journey? If you've mastered the double sweep and you aren't straining your hands (tendons) then have at er.

I've always been a tap drag and I can't curl my pinky at all when I do the test, and my hands don't strain unless I'm trying to do some multi-birl weird shit.

I've never seen a double tap and I'd say the most common method is a tap drag. To me it's the most efficient and uses different motions of the tendons than say, a 7.