When I was first introduced to scrollsawing, I was given the reverse tooth blades to use(#7). I used them for everything at that time - pine, plywood, both 3/4" thick. Now I am doing alot of very fine, intricate work and use a skip#1 for that. But anywhere shere that project has a fairly straight, longer line to cut I switch to the reverse 7. I find that the reverse blades have little to no tearout on the underside of the wood, and give a much smoother finishing cut. Of course, a longer line that is fairly straight or a gentle curve, is easier to cut with the stronger reverse blade.
Have fun.