Band Sawk > Scarf Sawk, Knock Off EQ (EQ covers Steel and Rock largely, which are decimated by CC anyway)
Use Life Orb on Magmortar, coverage is one of Magmortar's best points. Consider HP Grass > Focus Blast to smack Seismitoad and Rhydon, Fire Blast > Flamethrower since you could use the extra power, and consider EQ > Pyschic (No I'm not crazy) to smack Lanturn, Probopass etc. Max out SpA and Spe, Mild Nature, 4 EVs on Atk if you go with EQ. You can also consider Expert Belt to bluff a Choice Item.
Archeops. I'm not sure about running Sitrus, but I guess it's alright. Consider SE > Rock Slide, though I understand you want the accuracy and U-turn is an option to run somewhere on the set to maintain offensive momentum.
Pyroar. Now that you lost your Scarfer, go with Scarf Pyroar which is v nice. Consider Overheat - while it forces you to switch out immediately, it has the ability to take down 75% Slurpuff and OHKO a +1 Lilligant which Flamethrower can't,
Honestly, I'm not sure about running Accelgor, but you could try gun for the Final Gambit set which is actually decent. Also consider using offensive Spikes stacking rather than Specs Accelgor which I rather disapprove of. Bug isn't a really great spammable STAB anyway.
Dragalge, no. Use 248 HP / 192 Def / 68 SpD, with Sludge Bomb and Dragon Pulse > Protect and Waterfall. Though, you can lose Dragon Pulse for Protect if you don't trust your prediction / want the extra recovery really badly.
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Like Star said, watch the water weakness and Stealth rock. Feraligator is a very, very annoying Pokemon for your team to face as both DD and SD sets can sweep you. DD sets up twice, outspeeds your whole team, kills everything with Waterfall + Ice Punch, SD has Aqua Jet to jump Pyroar and Archeops who die pretty quickly against that. Set ups aside, you don't even have anything to switch into it effectively if it decides to attack right off the bat.
You also might want a better counter Belly Drum Slurpuff, that thing tears your team apart with +6 Return and Play Rough that smacks your team apart.
That said, you might want to try Ferro as it can easily counter/check a large portion of the tier, and as far as I'm concerned, you'd really appreciate the extra bulk.
Swellow also breaks through alot of your team, and if it happens to have SR Support, Archeops can't even think about coming in (Damage calc down, I'm not sure how much Facade does to Archeops when under poison, but I'm guessing it does at least a good 50%)
A Rapid Spinner/Defog is also something to consider, because as Star said, you have the SR Weakness. That said, NU doesn't put as much emphasis on Hazards from memory, so you could probably get away with it if you switched a few members of your team around to cover your synergy.
