The super training method takes significantly longer then battling hordes. Its fun to do but not practical for a lot. The fastest way is to battle hordes. It also takes some preparation to do. U need 1 of each power item(takes 80 BP from the Maison, which isn't difficult just using you hall of fame pokes), u need a pokemon with pokerus to spread to the pokemon. U want to train. You need a pokemon with sweet scent and preferable a pokemon that can hit every poke at one time(your surf poke works perfectly). Once you have all that u can ev train a poke in 20 minutes.
1) attach power item to the poke u want to train(ie power anklets for speed)
2) spread the pokerus to the poke u want to train(with the exp share OFF, so u dont risk giving it unwanted ev)
3) use sweet scene t to attract a horde. If it a proper horde(ie training speed and wingull horde appears) then ko all those poke. If its not a proper horde(ie training speed and mareep horde appears) RUN!
Repeat step 3 5 more time tonmax out your Stat. Then move to the next spot to train another Stat and repeat step 3. The last 6 points can be done using super training.