I'm going to quote this because I feel like it's a really great guide, and I believe the typing that fits it best is Electric / Fire. Let's look at that list of criteria one by one, and see how Electric / Fire measures up. Passive damage weakness: Weak to every form of hazard damage and both damaging weathers, including taking 25% from SR. Weak to Toxic and leech seed. We have this pretty well covered. Good overall STAB combo: Electric / Fire has incredible coverage against many of the Pokemon in OU and confers access to extremely powerful, highly risky STAB moves like Flare Blitz, Overheat, Magma Storm, Wild Charge, and Thunder. Our CAP would be very versatile going into the stat spread discussion, too, because Electric / Fire can hit from either side of the spectrum very effectively. STAB that cannot realistically be spammed endlessly for maximum impact: Fire has a large number of key resists and is hurt by Rain, while Electric has common immunities and also a number of key resists. Lots of weaknesses and resistances: Weaknesses to water, rock, and a 4x weakness to ground are assuaged by useful resistances to Fire, Electric, Grass, Steel (4x), Bug (U-Turn), and Flying. STAB on notable risky moves: Already covered this above, but both STABs have access to a number of risky moves. Fire / Electric is absolutely amazing for our purposes here and I hope everyone votes on it because I've been trying to have a Fire / Electric CAP made since Krillowatt. Won't someone please think of the FlareBlitz.