I have friends who dabble with autos. Longtime growers who produce excellent cannabis. The autos I have sampled from them leave me wanting. While being frosty, dense, aromatic and excellent tasting, I get the same feeling of wanting to be high.
I have grown autos but horribly and need to experiment more some day but from friends I have sampled well grown examples of Dutch Passion, Mephisto (which were the all around best of the autos I've tried), Taste buds, Fastbuds, and others.
The strains I'd try to dial in and held some promise regarding potency while sacrificing yield were Afterthought autos. Definitely the most potent autos I've tried. They still left that undercurrent of un-high for me though.
Full disclosure, I smoke A LOT of potent proper pot. So it has to be some fine cannabis to satisfy my picky ass haha