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Swampert is basically a physical attacker rather than a special one (and defensive), and using accuracy lowering attacks and a normal STAB w/o any physical boost doesn't really do much (mainly because lowering accuracy means a chance of the attacks missing and not definite :x), sooo for attacker you'll do a lot better w/ this:
172 HP / 252 Atk / 84 Spe
- Waterfall / Aqua Tail
- Ice Punch / Stone Edge
Since it'll allow you to hit hard with your main physical STABs, and cover things that your STABs can't with the other two.
For Salamence, having Dragon Pulse doesn't really help because you've already got Dragon Claw & Dragon Tail which are physical, aka what Mence specialises in, while having no investment in sPA confuses me. :x If you want a sweeper, go for this set:
Either enable it to perform the sweeper role, depending on which you prefer.
Reuniclus mostly needs since it doesn't incur any damage from hazards etc as well as LO, so really for that extra boost in power w/o fear, you need that. :x As for coverage, you're weak to pretty much every dark type and ghosts, so focus blast is necessary and/or shadow ball. Also, lowering opponent's attack etc won't work because you want to boost your own stats, rather than lower the opponent's, because they can just switch out. Plus for Reuniclus, Recover is a much more reliable move for recovery. There's also the fact that opponents could easily Taunt you, due to its terrible speed.
However, if you do wish to affect stats & recover, this set is much more suited:
Reuniclus@Life Orb / Leftovers
252 HP / 252 Def / 4 SpD
- Calm Mind
- Psychic / Psyshock
- Focus Blast
This will allow you to recover and attack and boost your own stats rather than play with the opponents, as well as give you coverage.
For Mienshao, Aura Sphere doesn't really do anything (plus it's special and you'd gain more power from HJK), so considering you plan to make use of Fake Out, you're better off with this set:
252 Atk / 4 SpA / 252 Spe
- Hi Jump Kick
- Hidden Power Ice
- Fake Out
Regeneration will allow you to recover as you switch out, which you'll be doing often, thanks to U-turn generally after Fake Out in most cases, while the other attacks are for coverage with things you'd otherwise struggle with aka dragons and your STAB, HJK.
On Scizor, I hope you meant to say Bug Bite & not Bug Buzz, because Bug Buzz is special, and with a Choice Band + Technician, Bug Bite performs muuuch better.
But it gets STAB from Earthquake, anyway. Earth Power is a special attack and doesn't benefit Swampert in any way while you've got Earthquake. If you switch Swampert in on a Choice Band, using Earth Power has no point because it doesn't get any boost. :x Superpower, however, is both physical & can provide good coverage.
Aaand Fire Blast because you'll likely end up facing steel types, in which your dragon STABs can't do anything to (aka why they send in steels), while Fire Blast has just enough power to destroy those steels.
Also remember that Bullet Punch has priority, and a lot of the time it's necessary to use. You could always stick Brick Break or Superpower in the place of Bug Bite 'cause you have U-turn anyway (aka bug STAB and allowing you to switch!) in order to take on Magnezone and other steels you can't face otherwise.