When levelling keep in mind that faction gear is very good. Grind some rep and get the best faction gear for your level.
Pyromancer isn’t top tier, but it can still do very well. It’s a good choice for a first build IMO. Kraken is awesome, but it is better suited to melee IMO.
I would suggest switching to focus on fire and chaos damage with dual wield pistols.
With ideal gear this build can beat the second crucible difficulty. Haven’t tried higher yet. When you hit 85 you could probably immediately do Steps of Torment. Enjoy.
http://grimcalc.com/build/EIoFmuR
Skills:
Flame Touched - You are taking this mainly for the flat fire damage and offensive ability. Flat fire damage is added to your weapon damage only. Over level it if you can.
Temper - Optional 1 point. If can give you some value when you get items which give extra demolitionist skills.
Blast Shield - Amazing defensive skill. That damage absorption is nuts. Definitely over level.
Fire Strike - Flat fire damage and extra % weapon damage is good. Over level if you can.
Explosive strike - One point is fine. Flat physical is not useful considering it is not a physical build. Burn isn’t great in general.
Static strike - Amazing in certain builds, but not great in this one because it focuses on lightning. That chance to knock down will get better when you get + skill level items.
Brimstone - The bread and butter of the build. Flat fire and chaos damage is delicious. Also it makes it an AOE.
Flashbang/Searing Light - Great skills, but I only ever put one in each. I let my + skills increase them.
Vindictive Flame - Great skill. Overall speed, regen and stun retaliation.
Ulzuin’s Wrath - Knockdown and slow attack retaliation are very good. Let + skills level this.
Solael’s Witchfire - Flat chaos is always great. Attack speed too. Even though attack speed doesn’t scale well, over level this for flat chaos damage.
Second Rite - One point for vitality resist and a bit of % chaos damage. Let + skills provide their benefit.
Possession - Awesome skill. 12% damage absorb is amazing. Also it gives you flat chaos damage which is perfect for this build. Extra % chaos damage is a bonus. Over level for more flat chaos damage! (Note: I keep this at 12 on my conjurer because he doesn’t need the flat damage)
Curse of Frailty - Put points in and let + skills increase it until you are happy with the area. I never put more than 1 or 2 points in this for a non-physical build.
Vulnerability - Less elemental resist helps your fire damage and less defensive ability means more crits. Honestly I’m a little on the fence about this one. Anyway, keep this at 10 points. Do not over level. It scales very badly past 10 points.
Blood of Dreeg - A heal, regen and offensive ability. IMO over levelling this skill is mandatory for any class which has occultist.
Aspect of the Guardian - 12% physical resistance is very good for defence. Also you won’t have to worry about poison resist on your gear. Keep this at 12 points. Don’t over level.
Devotions:
Viper - Offensive ability and -20 elemental resists is awesome. Flat reduction to resist is a very powerful stat. It will get applied off your weapon damage (fire strike). Also this is needed to support Behemoth.
Hawk - Crit damage, offensive ability, reduced cunning requirement… What more can I say? Also supports Abomination.
Scholar’s Light - Bit of resist, damage and energy regen. It’s not amazing, but fine to support Abomination.
Fiend - More fire and chaos damage. Not great, but supports Abomination.
Solael’s Witchblade - More fire and chaos damage is nice, but the resist reduction and slow on Eldritch Fire is what you’re really after. Great constellation and supports Abomination a bit.
Behemoth - Great health and regen. Very nice defensive constellation. Supports Abomination.
Chariot of the Dead - Tons of cunning and offensive ability with a bit of defence. Great constellation. Supports Abomination.
Abomination - Just to Abominable Might and pick up that health and offensive ability on the left. Abomination Might gives more health and flat chaos damage which is amazing. Abomination gives extra offensive ability, health, chaos damage and poison resist. Very nice.
Ulzuin’s Torch - Grab some crit damage, offensive ability, fire resist and fire damage here. Burn isn’t great and the meteor shower isn’t all that great with this build.
Revenant - Extra points to spend? Life steal and attack speed are great.