Would you like to suggest a Tough Claws set?
EDIT: I know what you mean too, but I just want to see your perspective of things
X-Scissor and Superpower seem to be relevant coverage. X-Scissor leaves you resisted by Water/Fighting and Water/Fairy, while Superpower leaves you resisted by Water/Fairy and Grass/Fairy.
You could run a Technician Mega Crawdaunt with Aqua Jet, Aerial Ace, and Rock Tomb as your attacking moves. Its Aqua Jet hits even harder, and what it lacks in brute force on other moves it could possibly make up for with increased super-effective coverage and the ability to only be resisted by Water/Steel and Dragon/Steel. (Read: Empoleon and Dialga.)
Another lulzy thing you could do would be to have Serene Grace as your ability and spam Razor Shell and Rock Slide. After Serene Grace, Razor Shell nerfs the foe's Defence every time it hits, so there's not a lot that can stay in for long.
As for how to really break the meta in two:
Shiny Mega Victini: 100/110/120/130/120/120
Victini @ Mega Stone
Ability: Contrary
Shiny: Yes
EVs: 4 HP / 252 SpA / 252 Spe
Modest/Timid Nature
- V-create
- Overheat
- Thunderbolt
- Focus Blast
V-create is just there to boost your Defence and Speed every time it's used, and still does some damage even uninvested with a -Atk nature. Everything else is for maximum coverage and nuking power, especially with Overheat to act as a Nasty Plot after dealing damage.
Dragalge.
Dragalge-Mega
New BST: 65/85/100/127/143/64
Dragalge @ Mega Stone
Ability: Adaptability
EVs: 8 Def / 248 SpA / 252 SpD
Modest Nature
- Sludge Wave
- Draco Meteor
- Hydro Pump
- Focus Blast
Dragalge be like "Protean or Sheer Force plz."
How about:
Dragalge @ Mega Stone
Ability: Sheer Force
Shiny: Yes
EVs: 8 Def / 248 SpA / 252 SpD
Modest Nature
- Sludge Wave
- Draco Meteor / Thunderbolt
- Scald
- Focus Blast
Consider switching Draco for TBolt, which gets much better SE coverage on the whole, though it doesn't get STAB and it leaves your entire set walled by Giratina and Dragalge. Scald has 6 less base power than Hydro Pump, but has 100% accuracy and a lot more PP. Focus Blast is as inaccurate as ever but is now very, very powerful. Sludge Wave is the real star of this show, however, hitting 185 base power after Sheer Force and STAB (though it is still weaker than Adaptability). The benefit is more accurate yet still high-powered Water coverage, as well as powerful Electric coverage in Thunderbolt. You could also use a Protean set with the exact same moves as you had above, or use Contrary to abuse Draco Meteor.