Will rate a few, then I gtg. Promise to rate others later. Promise.
Swampert - Anything for an item would be fine here. I'd go maybe with Focus Band for MC combo there.
Blaziken - Go with Sky Uppercut for last moveslot. It's not worth wastin a BB TM here in my opinion. Scope Lense + Blaze Kick. I use it, and I suggest you do too!
Sceptile - I don't know here. I know you have Brick Break for a TM left, and it might be worth using. Go with this maybe:
Sceptile @Miracle Seed
-Leaf Blade
-Dragon Claw
-Brick Break
-Aerial Ace
I know this looks weird, but w/o Crunch he's not too great of a special sweeper. Roar goes last, and isn't a good idea on him. BB and AA will take care of Normal types, and Grass types for you. Only problem is splittin EV's but I think this is your best choice.
I gtg, I'll rate rest later! Hope this was of some help!