The Varasano method is probably one of the most popular 2x2 speed methods, being easy yet, quite fast. The idea is to solve one face, not layer, orient the opposite face, and then permute everything in one alg. It has a total of five algorithms, two of which are PLLs. This method can easily get you sub-5 and maybe even faster. Another thing that makes this method great is that Auto can't think of any way to make fun of it.