With Skarmory, Drill peck over Aerial ace. You're not likely to suffer any accuracy cuts, so the extra power is well worth it. Also, Houndoom isn't one of the better pokemon for utilizing Focus band, for his lack of uber speed and/or defensive stats. You also need the versatility if you're going to use Sunny Day. I'd suggest changing the Item to Salac berry, or changing the moveset to make more use of Focus band. Your call.

My last suggestion is to get a pokemon to deal with electric types. Your team would take a large beating from a solid electric like Raikou. Swampert, or any other ground type with average+ Special Defense would do nicely here. Regice would also work. The only problem is choosing which poke to replace ^_^.

Other than that, the team looks good.