Spider Pack
Carrion Spinner:
Hits fairly hard (about 1300 on plate)
Poison Bolt - Direct damage nature damage hits for about 1500
Web - Line of purple light shoots out and targets someone within 30 yards. That person is pulled up to the Carrion Spinner's melee range. This does not apparently cause the person to move up on the threat list. It interrupt spells.
Venom Stalker:
Poison Charge - Charges an enemy and causes poison damage to all within 10 yards of the target. Puts a debuff on players that does 2500 Nature damage every 3 sec for at least 9 sec. Appears to be random target. Combined with the Veil of Shadows from the Dread Creepers and this spells certain doom to anyone not wearing heavy Nature Resistance. Debuff can be cured.
Dread Creeper:
Veil of Shadow - Area effect debuff (Curse) that reduces healing effects by 75% on the target
Strategy:
We were only successful in killing the spider packs if we killed the Venom Stalker first, then the Dread Creepers and finally the Carrion Spinners.
Crypt Stalker
Unknown
Infectious Skitterer
Attacks in packs, crits cloth for 1300.
Strategy:
Pally runs in with shield and aggroes all the spiders. send 2/3's of your warriors in to grab a few spiders each, with the other 1/3 standing among the clothies to pick up any that aggro healing. Assist a few spiders down, then ranged aoe the rest. No one dies, mana stays up, the pack goes down quick. (the pally pull isn't entirely neccessary)
Tomb Horror
Unknown
Necro Stalker
Poison Charge: Does 2500 damage and adds a debuff to nearby players that ticks for 2500 nature damage every 3 sec. Can be cured.
About 80k hit points.
Strategy:
The raid should be spread out to minimize the amount of players who are hit with Poison Charge. Focus fire and kill them immediately.
Naxxramas Acolyte
AE if too many players in range.
About 25,000 hp each and they don't respawn fast like the spiders near there.
Naxxramas Cultist
These guys knock back.
Knockback interupts spells.
Keep them away from casters.
AE Shadow Aura , ~500dmg