I've been running a Smeargle set that has been getting me off to a good start.
Smeargle@ Choice Scarf
Own Tempo
Jolly
252 HP. 252 Sp, 4 Def
Spore
Will-o-Wisp
Trick
Rapid Spin
It allows me to mess up almost any lead except some opposing Scarfers and Lum/Chesto holders. If they lead with a Zong or something, it's Trick bait. If they use a suicide lead Azelf or something, I can spin the rocks away later. Will-o-Wisp is often totally unexpected, and I usually use it on switches after I Spore (assuming I Tricked). Even without the Trick at the start, I can switch him in later and mess something else up. The Scarf pretty much guarantee they suffer one of my afflictions. It ruins their momentum early on, and allows me to do it again later as well.
In my opinion there's more to a good lead than trying to gain momentum at the start. It should be useful later.
Smeargle@ Choice Scarf
Own Tempo
Jolly
252 HP. 252 Sp, 4 Def
Spore
Will-o-Wisp
Trick
Rapid Spin
It allows me to mess up almost any lead except some opposing Scarfers and Lum/Chesto holders. If they lead with a Zong or something, it's Trick bait. If they use a suicide lead Azelf or something, I can spin the rocks away later. Will-o-Wisp is often totally unexpected, and I usually use it on switches after I Spore (assuming I Tricked). Even without the Trick at the start, I can switch him in later and mess something else up. The Scarf pretty much guarantee they suffer one of my afflictions. It ruins their momentum early on, and allows me to do it again later as well.
In my opinion there's more to a good lead than trying to gain momentum at the start. It should be useful later.