Role: Hail setter/ SubSeed
Trait: Snow Warning
Nature: Calm / Sassy
EVs: 252 HP / 172 Def / 84 SpD
~ Leech Seed
~ Blizzard / Ice Shard
~ Protect / Wood Hammer / Focus Punch
This set takes a defensive approach, utilizing Abomasnow's decent defenses and typing. As the name suggests, Substitute and Leech Seed are the most important moves. Substitute protects Abomasnow from damage and status, and Leech Seed restores its health while simultaneously reducing its opponent's. Blizzard is a great move to have on Abomasnow, as it is powerful and a reliable STAB under hail. When Protect is used alongside Substitute and Leech Seed, Abomasnow can be very annoying because Protect allows it to recover the health it loses from creating Substitutes.
Ok for Kyurem if you are going to have Roost then you want a Subroost Kyurem.
EV's: 52 HP / 220 SpA / 236 Spe
~ Ice Beam / Dragon Pulse
~ Earth Power / Focus Blast
Rather than focusing solely on Kyurem's massive Special Attack stat, this set utilizes its above-average bulk, its nice set of resistances, and its Pressure ability. Substitute is the crux of this set, as it eases prediction and prevents Kyurem from being crippled by status or revenge killed easily. Kyurem can make 101 HP Substitutes, that will only fade after two hits of Seismic Toss or Night Shade. Weaker moves, such as Scald and Volt Switch, usually won't break the Substitute either thanks to Kyurem's resistances and above-average defenses. When combined with Roost, Substitute can even be used to stall out the opponent's PP with Pressure, which is especially effective if only one or two moves can break Kyurem's Substitutes. Pokemon you might expect to beat Kyurem, such as Bronzong, can be rendered useless as their attacking PP disappears.
Ok i would switch Glalie for it's old sister Froslass.
Trait: Cursed Body
EVs: 248 HP / 8 SpD / 252 Spe
~ Ice Beam / Shadow Ball
~ Pain Split / Destiny Bond
Froslass utilizes her blazing base 110 Speed to quickly set many layers of Spikes. Her Ghost typing provides immunities to Fighting- and Normal-type attacks, which in turn allows her opportunities to switch into battle and prevent the opponent from clearing the Spikes with Rapid Spin. Froslass can further use her Speed to Taunt opposing Pokemon, preventing them from laying hazards or boosting their stats. STAB Ice Beam gives Froslass some offensive presence, and allows her to OHKO Gligar, Flygon, and 2HKO Zapdos. Furthermore, it prevents Froslass from being useless when faced with a faster Taunt user, such as Azelf. Shadow Ball can 2HKO Azelf and usually OHKO Chandelure after Stealth Rock damage. Pain Split is Froslass's most reliable form of recovery, and can simultaneously heal Froslass and weaken a Pokemon with more HP. Alternatively, one could again take advantage of Froslass's great Speed by using Destiny Bond when she is at low health, KO'ing the opposing Pokemon as well.
There rest of your Pokemon i agree with so i will leave them alone...For now. Just Kidding.
No really you have obviously worked hard on this team and i congratulate you. I hope you consider my suggestions.