Lambach
Arcane
Meta-Snowballs are very party friendly and bypass SR. Ice Storm lays down Difficult Terrain and can be used to turn on Enforced Vigor if you want to go that way. Cold Ice Strike is Swift. Polar Ray also party-friendly and can do plenty of damage.Cold-based damage Spells are kinda shit.
None of them are inherently party-friendly, so Selective Spell is almost a must if you want to make the most of them, and the AoE ones only go up to 15d6.
This is P:K:
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AoE nuking is more for soloing, but if you're playing TB you should be able to position them fine without Selective. There are certainly more Fire Damage items than Cold, but both Cold (with Waves) and Divine Nukes can give you damage + control which is more useful with a party. White Dragon Armor + Elemental Imbuement Robe gives +2 dam per die Cold.
Yeah, you can make it work, sure, but Fire and Electricity are just objectively better when it comes to nuking.
Controlled Fireball, Fire Snake, Fire Storm. Nothing Cold-based offers such flexibility without Metamagic. Stormbolts is fucking amazing, nothing Cold-based comes remotely close to either the damage or potential CC.
But, I do agree AoE nuking in general is a very sub-optimal option in Wrath and CC is the undisputed King. However, it is fun to build Daeran so that he can heal 180+ HP to your Party in one Round, then drop 200-300 damage to every hostile cunt on the screen in the next one.