I’ve having troubles locating synergy for this class (nightblade/demolitionist). Could you fine folks point out skill synergies I’m missing and equipment that is made for this class combo?
I’m going to play one, I just need some ideas.
Fire Strike + Dual Wield Procs is amazing.
Flame Touched + Vindictive Flame + Pneumatic Burst/Shadow Dance will make any Saboteur very tanky and offensively capable.
Builds:
Tri-Element Saboteur - jajaja Focus: Armor, Life Regen, Fire Damage, Chaos Damage
The Maelstrom - me Focus: Lifesteal, Lightning Damage, Procs
Thanks 
So, looks like synergy is there, just not in terms of similar elements or whatnot.
You could as well go pure fire (with some lightning): http://www.grimdawn.com/forums/showthread.php?p=347773#post347773