Although it depends on several factors.
Do you want KoK?
Do you really need Draconic Curse?
You shouldn't max hellzone grenade cause the damage doesn't get boosted by alot, the sp is much more needed in other skills.
Most SKs will agree. The stun is at level 2 because it is only a interuption. Most SKs wear anti stun so it wont do anything. But, its enough to be good if they dont use it.
You need arm pull at lvl 4 for more range and cooldown
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