my old SS team was a lead tanking Hippowdon, a Spiking Skarmory, a DDing Ttar (@ Lum Berry, threw people for loops
), SD Scizor, a Focus Sash Dugtrio (generally my revenge killer, hopefully before the other person has induced any entry hazards), and a special tanking Dusknoir.
As I wrote in the thread, if running ScarfGar in doubles, you MUST run trick- it is a pain to use, but its your best answer if you know your opponent is running a RDing Electrode lead. If you want Gengar without the Scarf, I suggest giving Gengar Life Orb and giving Lucario Focus Sash. Lucario Focus Sash is a pretty common set, idea is SD into what would be an OHKO move (Fire Blast, EQ, etc.) and Extremespeed your way out of it.
For your 2 extra pokemon, I suggest either a pokemon with Swift Swim or Water Absorb for one of those, and a bulky attacker as your final. Vaporeon , Hippowdon, Mamoswine, Tyranitar, Dusknoir, and Swampert all look decent with your team. You just need to figure out what combos you wanna use. Be careful about using EQ users, as your team doesnt like EQ very much (another reason Gengar looks beautiful on your team).
again, if you need any help, just ask- im happy to help