Employeon wouldn't be half bad of a choice because your team seem to be physically offensive(feraligator swampert[assuming its a cursepert] and kingdra[double dancer]) and needless to say aggron would be either spamming thunder wave or go with the usual rock polish+magnet rise set skarmory wont be using a special movepool either so the petaya set employeon would fit your team fine

most people use stealth rock, so focus sash is pretty much useless, and magnezone won't survive many ground attacks even with shuca berry (coz most EQ users have a high attack stat). You mainly use Magnezone to eliminate other steel types. There's nothing wrong with having Empoleon, because two of your water types don't have the electric weakness most Pokemon use against waters. Empoleon is a good special tank, 101 base special defense is quite good. you have a bit of a suicune weakness, so empoleon is even more useful because it has grass knot. the waters also cover fire types well, so nothing wrong with having jirachi. If you don't care about your reputation in Pokemon battles, use a flinchax Jirachi, which is Serene Grace Iron Head with a Choice Scarf. Similar with Scizor. The water types cover fire attacks, and Scizor also covers grass attacks launched at the first two waters.

My personal suggestion:
Scizor @ Choice Band
Adamant, Technician
248 HP, 252 Attk, 8 Speed
~U-Turn
~Bullet Punch
~Superpower
~Pursuit

Um, did you listen to what I said? I want a Special Tank. And I've been thinking about registeel, but some tournements ban legendaries.

Personally, I like bastiodon, But sometimes it seems I am the only one.
)

I really want to, but it's 4x weakness and offensive are so horrible >.< they should of gave it solid rock.