Disclaimer: This list is purely theory-mon, no testing yet. I just want some preliminary thoughts. I'll try to update with testing results.
Strategy: Use Yveltal/Dark Patch to set up M T-Tar. The damage from Yveltal's Oblivion wing can be spread by Absol so that multiple OHKO's can be streamed.
(Expanded Format)
POKEMON
3-3 M Tyranitar EX
3 Yveltal XY
2 Absol ROS
1 Darkrai EX
2 Shaymin EX
1 Hoopa EX
TRAINERS
4 Sycamore
4 N
1 Colress
2 AZ
2 Lysandre
3 VS Seeker
1 Computer Search
3 Tyranitar Spirit Link
4 Ultra Ball
2 EXP Share
1 Hard Charm
4 Dark Patch
2 Acro Bike
ENERGY
8 Darkness
4 DCE
Strategy: Use Yveltal/Dark Patch to set up M T-Tar. The damage from Yveltal's Oblivion wing can be spread by Absol so that multiple OHKO's can be streamed.
(Expanded Format)
POKEMON
3-3 M Tyranitar EX
3 Yveltal XY
2 Absol ROS
1 Darkrai EX
2 Shaymin EX
1 Hoopa EX
TRAINERS
4 Sycamore
4 N
1 Colress
2 AZ
2 Lysandre
3 VS Seeker
1 Computer Search
3 Tyranitar Spirit Link
4 Ultra Ball
2 EXP Share
1 Hard Charm
4 Dark Patch
2 Acro Bike
ENERGY
8 Darkness
4 DCE