Welcome to Gaia! ::

Changes In Bold
I don't know if you do ev training or not, but proper ev's help a lot

as for your team i'll break down my changes:

while hydrocannon is a base 150 it comes off of Feraligatr's low special attack, add to that an adamant nature which reduces spec Attack by 10% it doesn't become as effective as you would hope, add to that the recharge turn and it becomes a very ineffective move to use, waterfall becomes the best alternative a base 90 attack off of a base 105 attack state will do much more damage especially if you couple it with LifeOrb
Earthquake and IcePunch are there for coverage, the reason why life orb is better than mystic water is that it boosts all your moves instead of just the water typed move, there is the recoil, which can wear it down if it gets enough attacks in to matter, so leftovers can be an option for a bit more survivability


If you're going for a parafuser, then bulk is what you want, it has a base 105 special defense but a base 60 HP & Def, so maxing out hp while investing ev's in def would be best, and you want at least one attacking move so that you don't become taunt bait yourself

this one is fine with the exception of wing attack outrage will hit anything that wing attack will for more damage, so you'll want to replace it with either Earthquake or extremespeed, Earthquake will hit heatran and empoleon which resist Outrage and Firepunch and will probably hit non levitating steels harder


You want poison heal and toxic orb for this set, you'll get a lot more healing done this way without having to take a turn to set up leech seed
replacing leech seed with seed bomb gives you better coverage plus another stab attack


energy ball is a great lure move, with a ninetails out a lot of people will switch to a water or ground type pokemon, with energy ball and a nasty plot behind it, it'll take care of pretty much any threat it ends up facing, you also want a timid or modest nature as those boost speed and sp atk respectively and reduce attack

jolteon has almost double the base spatk then atk so i've switched the moves and nature accordingly, normally you wouldn't want two attacks of the same type but charge beam can give you a special attack boost also

as for an overall critique it's a fairly balanced attacking team with mismagius a possibility as a special sweeper if you want it to be, the only double weakness you have is ground in jolteon and ninetails, but you also have a double immunity to ground in dragonite and mismagius

above all, if its a team you'll have fun using that's really all that matters, but sometimes tinkering around and finding out what will run through your team and adding counters will make it better, maybe a wall or two, and think about adding a lead that can set entry hazards, since you'll want to help out the sweep as much as possible and discourage switches

hope i was able to help