as a lead, I currently run 252SpA/252SPD, Modest, Psychic/Grass-Knot/Stealth Rocks/Ice Beam @ Lum Berry(this lead was really just random, so the EVs are probably bad; I'd been using Pinsir, but didn't like the amount of flying weaknesses on my team).
I've ran Thunderbolt, U-Turn, Thunder Wave, Toxic, Shadow Ball, Reflect, and Calm Mind in Ice Beam's spot, but I really don't know what should be there.
I've also used a Trick Scarf lead with 252SpA/240SPD, Modest, Psychic/Grass-Knot/Ice Beam(or Thunderbolt)/Trick, and it's pretty funky fun. I find it far more useful than the generic Tricks Scarf Me.
also, I'm thinking of trying an expert belt lead(with SR/Psychic/Ice Beam/Grass-Knot(or Thunderbolt), but Lum has been so useful as of late, as I've encountered a lot of status leads.
I've tried running without Rocks, but as I generally run teams based on the OU style of hyper offense, and thus don't have specific counters to Swellow, Scyther, Moltres, et al, their importance is paramount to my team scoring KOs with priority.