HP: 77
Atk: 120
Def: 90
SpA: 60
SDef: 90
Spe: 48
Druddigon is one of only two fully evolved Dragon Types in the RU Metagame and has a lot going for him. His high 120 base Attack makes his Outrage extremely powerful and his great Movepool allows him to hit all of the few Dragon resists for SE Damage. He is also pretty bulky and can take almost every non SE Hit in the tier and KO back with Outrage this is extremely important, because he is so slow that even most walls outrun him. Sadly Gamefreak denied him access to any useful boosting moves so unless you pass some Speed to him you're not going to sweep teams with him.
Druddigon@Choice Band
Nature: Adamant
Ability: Rough Skin
252 Hp/ 252 Atk/ 4 Spe
-Outrage
-Dragon Claw
-Superpower/Fire Fang
-Sucker Punch
This is imo his best set, Superpower deals with the few Steel types in RU and Outrage with everything else. Sucker Punch is very useful as a utility move to pick up a weakend sweeper just be careful as a choiced Sucker Punch allows other Pokemon to set-up. Dragon Claw is cool if you don't want to be locked into Outrage for some reason and while its a lot weaker than Outrage its still strong enough to OHKO most sweepers. EVs are into HP, because investing in Speed is not worth it and the Atk EVs are self explanatory. It may be worth to invest some speed to outrun some of the common walls, 20 Spe EVs outspeed uninvested Base 50s most notably Tangrowth and Aggron.
If you use Fire Fang Sheer Force should be considered as an ability, but i prefer Super Power and Rough Skins effect often comes in handy.