Create a level 1...8 Spirit. For creatures within its range, all elemental damage is cold damage instead. This Spirit dies after 30...126 seconds. Recharges in 60 seconds.
You're able to survive the Spirit Sheperds because they use
Iron Mist - For 5...15 seconds, target foe moves 90% slower than normal. That foe gains immunity to damage from all sources except lightning. Recharges in 30 seconds
I don't have an assassin so i can't come up with a skill build and how to spread the attributes. can anyone more knowledgeable w/ the class fill up the skill bar (or confirm if winter+iron mist farming is doable in the first place)?

SKILL BAR TEMPLATE
Winter
[Teleport] - Death's Charge(?) or something with a faster recharge
[Running] - possibly Storm Chaser plus it gives energy too!
[Heath gain] - Troll/Shadow Refuge(?)
[Attack]
[Attack]
[Attack]
[Attack]/Serpent's Quickness(?) - faster recharge for winter(?)
and there's also the elite skill..
ATTRIBUTES(?)
Wilderness Survival - 10/12?
Critical -
Dagger -
Deadly(?)
Shadow Arts(?)
against Spiders as long as you fight them one at a time i guess they can be killed. Spirit Woods will hit hard especially since Assassins have a low armor rating but if you kill them fast enough... Also they usually run around with a group of Spirit Sheperds so w/ iron mist + winter on they will, along w/ everything else, deal 0 damage to you. Rock borer worms use Throw Dirt and Pin Down. Maybe you can put in Apply Poison switch to a bow and just degen them to death (R/Me). just ideas..
-ant