I don't recommend that set. Dark has poor coverage only hitting Ghost and Psychic for super-effective damage and it's a one time shot. If you mispredict and Fling the wrong target you'll be stuck with three attacks for the rest of the match.
Also when it comes to Trick Room teams, you're catching the foe off guard so slowing down your Pokemon further doesn't help matters at all. Even when you get rid of the Iron Ball and Trick Room ends, you'll fail to outrun anything with a weak 176 Speed making it poor for sweeping. Best you can do is possibly tie Skarmory, Breloom, and Metagross with neutral nature and no speed investment.
I can't seem to recommend any other physical attacks, but Swords Dance is an option if you don't mind burning a turn of Trick Room to get a +2 boost for your other two attacks.
two things...one) my mistake i meant next is 35 since my post would have been 34 so u can get it...however i use porygon2 vs gyarados...thunderbolt plus trace is killer i may try HP dragon cause i hate kingdra and want to get some damange on it
"EVERYONE READ THIS POST!!!!THE POST NUMBER DETERMINES YOUR POKEMON SO NEXT PERSON IS POST 34 AND NOTE THERE IS 26 CAUSE I ADDED BRONZONG AFTER THIS STARTED XD"
According to that statement, I thought I was the 34th post and thus I decided to go by the 34th Pokemon which was Luke.
As for the Blaziken, I'm glad you like it. :) I chose Hidden Power Electric since your team didn't have Electric support which could be a problem when you're fighting Gyarados (I'm not sure what Porygon2 is running). Hidden Power can land useful kills on other possible waters that got worn down prior to Blaziken's arrival. I would suggest Grass but you already have Octillery with Energy Ball. Hidden Power Ice is also an alternative if you need to get a kill on threats like Dragonite, Flygon, and Gliscor.