I know how to drop D tune the low E but what note would I be looking for to do the same on the 5(A) string?
Drop D tuning is just low E to D. There are drop tunings that drop other strings too, but they aren't called Drop D.
Oh and Real men use Drop B.
Tool-Prison sex is so fun to play on a 62 gauge low E. So fat coiley and buzzy.