Ferrothirn looks good - set I use is the same but with power whip
Garchomp - as skel poison said use dragon claw but I'll come back to garchomp
Blazkin - don't use sky up cut
You can use thunder punch as coverage against water and fly
You can also use flare blitz and high jump kick I personally don't like hi jump kick seen as can do damage to user if misses
Blaziken - you can also set up garchomp by using Baton pass
If you have focus sash protect and hone claws or swords dance
Hone claws + protect and batton pass = 1atk boost 1acc boost 2 speed boost
With hone claws you can make dragon rush more acc
With swords dance you double garchomps atk
Garchomp - if baton pass - give life orb or choice band
When got two speed boosts it outruns a lot so scarf isn't needed
Use equake dragon claw stone edge/Irock slide and a hard hitting physical move
Duscolops - never used duscolops but I agree with ultimatelucario
Use w o w it halfs the opponents atk unless they guts
You will have a problem with taunt
Night shade or payback or pursuit
Pursuit would be a good one because if you use curse the opponent will want to switch out
Magnezone - do you really need magnet rise - magnezone has good
Def so can withstand equake from non ground plus has sturdy
And if a ground type is sent in you have hidden power
But good movest
Swampert - looks good I like to choice band my swampert but yours looks good you could always give it lagging tail - it will always have -7 priority plus that meens
You can use more powerful superpower or even counter
I just noticed it can learn outrage :o
Anyway hth