Scion Mjölner WIP

So a while back I got a Mjölner in Ambush (very exciting moment when it dropped considering how many Gavel's I'd chanced until that point), and I was considering letting it rest in my stash until merge into standard where I might have better chance getting together a build for it.

However I decided I will give it a try in Ambush, and looking for some feedback/advice, especially on pathing in the skill tree.

My ultimate goal will be trying to kill Atziri before end of Ambush.

My gem plans are:

Main attack: Lightning Strike + Life Gain on Hit + Multistrike + Bloodmagic + Faster Attacks
Mjölner gems: Arc + Arc + Iron Will (possibly lightning penetration instead of one Arc)

Auras: Determination + Purity of Lightning (swap for Tempest Shield at need) + Vitality (swap for Purity of Fire at need)
(with 21% mana reservation reduction I think I'll end up reserving around 80% of my mana, which I think should be enough for curses, leap slam and vaal cyclone)

CWDT + Enduring Cry + Immortal Call

Curses: Temporal Chains + Enfeeble + Conductivity (swap as needed)

Misc: Vaal Cyclone + Faster Attacks + Life Gain on Hit + Leap Slam (levelling + mobility)

Skill Tree:


I realize that is a very point heavy skill tree, but many of the nodes are filled in at level 90+ only, the perma curse (although would be extremely nice) can be left off until late.

This should net me in the end from the tree:

+330 strength
+240 intelligence
+60 dexterity (might need another +30 node)
+33% block chance
+23% attack speed
+218% increased maximum life
5.5% of life regenerated per second

Any suggestions or major faults I've not thought of?