I really should do this...:
1. Porygon 2 (Offensive Download)
2. Heracross (BU, though I might want this to change)
3. Staraptor (SubRoost)
4. Jirachi (Choice Specs)
5. Kingdra (Rain Dance)
Porygon 2 is a pretty epic pokemon, as both on paper and in battle. Able to both wall AND pose a threat at the same time is something few pokemon can boast, with reliable healing and great coverage no less. Status and too bulky walls can pose an issue, but everything has a fault. Bulky offense is what will probably form from this.
HeraBOSS will make an awesome start for an offensive team, it taking down the Psychic types mean to wall the other Fighting types, while they in return provide a one-two punch and most of them being capable of crushing the walls that trouble HeraBOSS. FU Slowbro and Celebi.
Staraptor might change to a CB set (At least I'm holding out for that), but either way, STAB Reckless BB coming from base 120 hurts. Add in good coverage and, quite frankly, watch your opponent quake in fear. Sturdier walls with no weakness to it's attacks can be troubling (Skarm >.>), but trapping and the like should fix it. Offensive teambuild yet again.
Specs Jirachi captivated my attention due the fact it gives an very, very unique way of support. Think of it as a boulder above the opponent's head that he/she has to take while dealing with the landslide in front of it (CB pokes, anyone?). This will probably not be the focus, though, as the partners that work best with it will steal the show. But who knows?
And finally, RD Kingdra. Nothing to say here, besides FU Rain. And weather. Or anything on the receiving end of a Rain+LO boosted STAB Hydro Pump for that matter.
Guess what? An offensive team will come from this set too! ^^