Warlock Build help

Need some help with a build, I die a lot lately so I figured asking in the forums could help.

The core idea for the build was to go for elemental damage using novas as aoe and sacred strike and iskandras to buff pets and melee(with devastation as one point wonder). Since it’s my first character i didnt plan more than that and here is the current state of the build:

http://www.grimtools.com/calc/d2jerPlN

I already asked while introducing myself in the forums and I know that for starters I need to cap my resists and get more physique (at least I dont need to invest on spirit)
Fixing those will stop them from destroying me?
Should I just remove pets entirely?
I added trozan sky shard the last because i started keeping distances because of oneshots but dont really know if its worth with the idea i had for the build?
Was i too newby to try a melee build with 2 weak (tankwise) classes?

Thx for any answer :smiley:

PD I just got to sewers btw