Two Scarfed revenge killers on one team is probably not a good idea. I'd run Specs or Life Orb on Hydreigon instead. Also, Lilligant's role can easily be played by Contrary Serperior, something along the lines of:
Serperior @ Leftovers
Nature: Timid
Ability: Contrary
128 HP / 128 Sp. Atk / 252 Spe
Substitute
Leech Seed
Leaf Storm
Hidden Power Fire/Ice
When you Leaf Storm, not only are you getting a STAB 140 BP attack, but it also acts as a Nasty Plot boost. After three Leaf Storms, with the spread listed you'll have 864 Sp. Atk, which should allow you to blow through just about anything and everything that doesn't resist it. HP Fire is for taking out opposing Grass and Bug types, and the extremely popular Ferrothorn, but leaves you pretty much SOL against pokemon that resist the Grass/Fire combo (which are pretty plentiful). Ice is if you're worried about an attempted Gliscor sweep or want to counter sweeping Dragons like Salamence. Sub/Seed is pretty self-explanatory, Serp's movepool is pretty limited and it improves his longevity by quite a bit and gives you better chances at a sweep.
I sorta created my dream team Took like 3 months to train them
Hydreigon lvl 68
Bisharp lvl 75
Golurk lvl 71
Zoroark lvl 82
Beartic lvl 72
Carracosta lvl 78
It took along time, but I finished them, currently EV training my Zoroark in defence because it lacks horribly in it. If anyone has any good spots to EV train defence tell me
Just going to assume you're trolling, since I use it regularly on both Pokemon Online and IR/Wi-Fi battles and it works exactly as intended.
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Every Pokemon on your team has a weakness to Fighting. My max Attack Conkeldurr could literally OHKO your entire team with a +1 Mach Punch.