I don't have a definite set, but I like a variation of the old substitute set:
Bisharp @ Leftovers (12 HP, 252 Attack, 240 SpDef, 4 Speed)
Sucker Punch
Iron Head
Power-Up Punch
Substitute
and something new:
Bisharp @ Assault Vest (12 HP, 252 Attack, 136 Def, 16 SpDef, 92 Speed)
Sucker Punch
Iron Head
Power-Up Punch
Psycho Cut / Night Slash
They are both adamant nature. Tbh I think it is better to go for more bulk than speed and just switch if someone sends in something that could cause problems if you are not behind a sub.