The strain in the hands of the grower who knows how to make things happen, with passion and attention to detail!!!
there's no "best yielding strain" but sativas and sativa leaners tend to yield more than indica dominant plants. but indica plants finish faster and take up less space so you can grow more to make up for the yield. your best bet is a hybrid cash crop like SSH or big bud or something. look for "outdoor strains" they should finish fast and yield heavy.