so Iím sort of a lurker here, but after reading enough on this website and some hard thought, I came up with this team which was good for a 106 streak on the Super Single line
(I know the EVís are built for level 100, and may not be 100% standard but I generally use the same pokemon for WiFi as the subway/towers in gen IV):
Uxie @ Lum Berry
252 HP/ 128 DEF/ 124 SP DEF
This is the crux of the whole team. Use it as a lead. if I get something Iím afraid will outspeed + taunt, I hit them with psychic or t-bolt (toxicroak is the most common taunter Iíve faced, easy KO with psychic). Otherwise, yawn. If Iím sure it has a berry that will wake it up, switch to scizor. If not, the way this works is Yawn + Memento on the turn the opponent is still awake, letting me switch in Haxorus (or scizor, depending on the opponent and the situation, but itís almost always haxorus as Scizor plays more of a failsafe role) on a pokemon that is garunteed to be asleep for at least one turn (because it fell asleep, and has not had one ďsleepingĒ turn yet). Lum is for preventing the opponent from messing with the fact that Yawn and memento *must* be successful back to back in order for this to work.
Haxorus @ Persim Berry
Ability: Mold Breaker
252 ATK/ 252 SPE
the main sweeper of the team, uxie sets up haxorus so I can set up a substitute for free, and get atleast one garunteed dragon dance up. If Iím lucky and he keeps sleeping, or if I know the opponent is using a -2/-2 attack that will not break the sub, I can be daring and try for more, but usually sweeping with +1/+1 outrage with a sub still up is enough. persim is obvious to deal with confusion from outrage, making it much more likely for haxorus to sweep through an entire team.
Scizor @ Focus Sash
252 HP/252 ATK
Scizor is the failsafe. Tried this same team with another pure setup Metagross (used hone claws for the setup attack) and the highest I reached was a 42 streak. Scizor is much more reliable, because especially with the Focus Sash, if something goes wrong with the setup, or haxorus somehow fails to sweep the entire team, Scizor can usually come in and save the day. with focus sash, he wins practically every one-on-one battle when haxorus fails, and if the setup goes wrong, heís bulky enough to take a hit and if not KO, at least take the trouble pokemon into low enough range that Uxie can KO before setting up on another. plus, a lot of times that the set up with uxie fails, I already threw memento at a pokemon and was surprised that it was carrying one of the awakening berries, in which case, -2/-2 doesnít touch Scizor and I can easily set up a swords dance or two. Did itís job perfectly.
PS want to thank Team Rocket Elite for his list of pokemon used by the subway trainers. EXTREMELY useful and definitely helped me hit 106.