i'm growing mi5, russian rocket fuel and Dr. Feelgood outdoors, the best outdoors being mi5 and russian rocket fuel, the Dr. feelgood is slacking, def. an indoor strain and very indica, amber trichs at 10 weeks flowering outdoors, compared to some that take 12/14 like the mi5 or russian rocket fuel.
Auto assassin is badass too, too bad i couldn't vote multiple times because Mi5/RRF/AA are all just as good really. mi5 has some issues with nanners/balls but usually they are sterile and the finished product is potent like a non auto.
Mi5: Its a indica/sativa hybrid along with it's auto genetic. smells fruity/kushy, some are much much smellier and those are keepers. the really sweet ones are reminiscent of tropical fruits or candy like starburst(even without nutes, as they take a light/medium feeding) i have one that i just cut down that smells like peach starburst. this particular strain purples in colder temps while some pheno's can purple outright because of the purple afghani used in the cross, and the other parent the auto ak47 adds good potency for an autoflower, and the afghan adds to the good yields.
Russian Rocket fuel: slightly faster maturing, similar tropical smells, my favorites smell like pineapple diesel and i wish i bred with them because they are like nose candy(not coke lol) the smell is very strong, good growth. Most pheno's are uniform(some short but usually medium sized in a good pot) but there are massive phenotypes as wel as in almost all of Stitch's work you've named there are massive yielders but they are much more common in the russian rocket fuel, expect 1-2 out of 30 seeds (3 regs packs are my usual amount to grow and select from... the seeds are cheap anyway)
Auto assassin: muck more AK47 dominant than the Mi5, stretchier, better outdoors as well
since it stretches more, the buds get better air flow and less likelyhood of bud mold. also a much faster onset, just as potent as mi5 with less tantalizing smells than both. this is probably the least smelly auto i grew, good potency and good yield like the mi5 and RRF.
EDIT
i voted mi5, 3rd grow of the strain and i still think its worth trying it once if you are interested in autoflowers. the auto assassin is better for those who prefer a sativa without any creeper effect, almost immediate effect and it does give the sativa effect in an auto(good level of cbd and cbn in comparison to the THC content it has.
also- start your auto's in their final growing medium, try not to transfer as they will get rootbound and stunted, the key is getting as fast a rootmass settled before it begins flowering, all of these 3 can achieve 3 oz in a 5 gallon if you grow it out perfectly (the rrf has been documented at around 1lb on the freakish bush pheno it can put out)
Auto Bubble is feminized all others are regular so i guess i will crossbreed some of them to get seeds 