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I thought it was basically just a kai choke clone with similar scaling off int/collar.
I believe Throttle is asphyxiation damage, which is unblockable type (except by HOLD BREATH), so no way to mitigate against it with resistances.
Aktillum said:11 intelligence Throttle = 913 damage13 intelligence + level 2 Collar = 1176
Down the road, pick up sash+collar for the increased mana and bashing damage (I think collar effects bleed curse dmg, Sena will have to correct me if its even worth it), but not before you focus on tanking artes first.