Druid Build Help needed

Hello all, I’d like some help with my build.

I’m currently playing a Lvl 84 Druid and I just finished Arkovian Ruins in Ultimate.
It’s my first character which got this far so I’m playing with what I could find.

OK, here’s the build, devotions, equipement and stats.

Build without gear : http://grimcalc.com/build/mI2lbt
Buil with gear : http://grimcalc.com/build/k0tlWb

Devotions (they’re also in the grimcalc) : Sailor’s guide, Viper, Eel, Tempest (on wind devil), Widow (on primal strike), Kraken, Behemoth (on mogdrogen’s pact), Hawk, Empty Throne, Spear of heavens (on Stormcallers’ pact)

Equipement :
weap1 : Empowered Falcon Claw
weap2 : some shitty lightning rifle I rarely use
helmet : Glory of the silver knight
shoulders : Dawnguard epaulets
gloves : Voidsteel gauntlets
chest : Empowered wildcallers’ skins
legs : Spellweave legwraps
boots : Golemborn greaves
belt : Stormtouched chains
ring 1 : Signet of the damned
ring 2 : Aetherstorm seal
amulet : Dawnbreaker’s beacon
medal : Mark of the apostate
artifact : Rampage

Stats :
Health/Energy : 11k/3.1k
Phys : 906 (62 pts spent)
Cunning : 349 (0 pt spent)
Spirit : 776 (23 pts spent)
OA : 1939
DA : 1626
Armor : 963
DPS : 15335 (with Primal Strike, +950% lighning)
Resists :
Fire 87%, Ice 82%, Lightning 90%, Poison 30%, Pierce 80%
Bleed 8%, Vitality 40%, Aether 46%, Stun 19%, Chaos 35%

It worked well in elite but I’m seeing its limits in ultimate, it begins to feel quite squishy. I must be extra careful in melee as my life can go down quite fast.
I managed to kill the Aether Nemesis and the Undead Nemesis but that were long and tedious fights.

For Strats, I usually begin by a wind devil, then wendigo and storm totem.
I try not to go too far from the wendigo and I finish the big critters with Primal strike. I can tank up to 2 heroics and their pack thanks to the wendigo totem and Mirror of Erectoes. But for more powerfull/anoying bosses I tend to kite, casting as much wind devils and totems I can.

The aether nemesis wasn’t that hard as I was really overcapped in lightning res (around 130% at the time).
For the undead nemesis I blocked it in doors with the totems and continuously casted wind devil to DPS it (it worked but that took quite some time).