Milotic - MC and Confuse Ray don't work well together. Ice Beam > Confuse Ray. You never know when they're gonna hurt themselves and then you just wasted a turn.
Gardy - Doesn't need WoW and Reflect. Both halve attack/damage, so I'd go w/WoW. It hurts them continuously and can't be broken by Brick Break. Go Destiny Bond in the last slot.
Blaziken - Overheat > Flamethrower. STAB plus he doesn't have much staying power so the loss of Sp. Atk. isn't that big of a deal. Sky Uppercut > Brick Break. And finally Equake > Mirror Move. Period.
-or-
Blaziken @Salac
-Overheat
-Earthquake
-Endure
-Reversal
I use this one, and it's awesome! Sweeps everything. I prefer it to tell you the truth. It doesn't have good stayin power and it's a good thing here!
Sceptile - Go w/this: Leaf Blade, Dragon Claw, Crunch, Protect/Toxic/Leech Seed. It's his natural role: Special Sweeper. He's darn good at it too, you'd be surprised!
Altaria - Doesn't need Safeguard. It's ability is Natural Cure so it's not that big of a deal using rest. Go w/this: Dragon Dance, Rest, Earthquake, Aerial Ace. It's classic for this guy. DD, sweep, and then Rest and switch. It works like a charm. No Dragon Claw here cause DD only for Atk, and Spd. AA is a STAB too, so I'd recommend that instead.
Swampert - Needs Mirror Coat. Definetally needs Mirror Coat. Put that instead of Take Down, and leave Rest.
Hope this was of some help!