In my brief foray into how a melee Elemental tactician would work, I could say off the top of my head:
Better Elemental Jewelry as there’s barely any that gives good skill bonuses + attack speed
Better Gloves as there’s one right now that even gives flat + attack speed and it’s the Dawnshard ones that buff Runes + Guardians of Empiryon
Better WPS, as you have Markovians + Zolhan’s + Seal of the Void as your only real options. Oh, and based off skill point bonuses and stats, which one of the dual-wield enabling medals looks the most appealing?
You can’t really benefit from Deadly Momentum or Steel Resolve because there’s no equipment that gives Elemental Damage + points to these abilities. Steel Resolve confuses me because the very skill gives Elemental Damage + flat Physical to convert.
You still have to deal with crap like Grava who boasts a high resistance to both Fire and Lightning, and Grava eats up Melee builds anyway.
I could go on, but even my brief look into it reveals a lot of flaws that can’t be tapered over by something like a Tactician.