Alright, I'm back rating teams for a few days, so this is as nice a place to start as any. After all, I love monotype teams.
Personally, I'd go Specs on Jynx. People often overlook how much of a monster Specs Jynx is.
Froslass seems pretty meh to me. Use her as a Spikes lead or don't use her at all, she's not good at anything else except maybe Specs. I'd recommend replacing Froslass with...
Cloyster @ White Herb
Trait: Skill Link
EVs: 252 Speed, 252 Attack, 4 HP
After a single Shell Smash, this thing will absolutely demolish anything not named Skarmory. If you manage 2 Shell Smashes, Skarmory has like a 70% chance of being OHKO'd by Icicle Spear, and nothing else can really handle his attacks. Rock Blast and Razor Shell are for coverage.
Hurricane > Hidden Power
on Articuno, and Icicle Crash on Mamoswine in the 4th moveslot.
Actually, I forgot about Hurricane's accuracy drop in Hail, and I also realized you have no spinner. Replace Articuno with Cryogonal so Stealth Rocks doesn't screw you over.
Cryogonal @ Leftovers
EVs: 252 HP, 248 Sp. Def, 8 Sp. Atk
-Ice Beam / Frost Breath
Cryogonal is really your only option when it comes to Ice spinners, but he's a great option. His unique typing and ability let him go one on one with most Ghosts and win, except Gengar and Chandelure. Levitate also gives him an immunity to Spikes and Toxic Spikes, which is a nice bonus. Most people use Ice Beam, but I personally love Frost Breath as it has only 15 less base power and lets him beat defensive boosters like Sigilyph because critical hits ignore defence boosts. Toxic and Recover let him toxic stall threats.