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Devotions that boost Fire damage will help, Make sure to check out the Kraken and Ulzuin’s Torch. Also, Spirit will be needed to get some jewelry as well. Put most of your points to Physique, but 20 or so level-ups into Cunning which will let you get reliable critical hits. Try acquiring an Infernal Brimstone, a unique two-handed mace that grants Rain of Fire on critical hits and boosts all of your Demolitionist skills. Make use of Flashbangs/Stun Jacks whenever needed. Increase your Fire and Burn damage along with resistance. You can drop Menhir’s Will to upgrade Flashbang or Stun Jacks instead and wait until you have acquired a specific weapon.
This build will end up using all of your Mastery Points. Two-handed weapons will be the best choice to get the best results. Grim Dawn Commando (Demolitionist/Soldier) Build – Hot Drinks
They also provide a pretty damn good utility with skills like Flashbang. Their balanced growth and lack of weapon dependency will open the build for either melee or ranged combat. With a barrage of explosives, traps, and munitions they can beat even the strongest of enemies. Pyrotechnic masters of the imperial army Demolitionists are part engineer part sorcerer.
Trozan’s Sky Shard 16/16 > Frozen Core 12/12. Olrexa’s Flash Freeze 12/12 > Absolute Zero 12/12.
Make sure to put your stats into the Spirit (around 24) and rest into your Physique. For cold damage, you can also use Tsunami and try building Amatok the Spirit of Winter. Maiven’s Sphere of Protection and Pneumatic Burst will make you quite durable for a caster. TSS has a pretty good range it is best to drop it off on enemies. Boost your cold damage and cooldown reduction and help you in getting higher resistance against difficulties.
This spellcasting build takes advantage of Cold damage while relying wholly on Olexra’s Flash Freeze, Blade Spirit, and Trozan’s Sky Shard to do most of the work.