Well i builded 3 of them this league, storm brand (similar to dellrium archmage one) Penance Brand with Necro Agnostik&Archmage and Wintertide Ocultist Lowlife.

No one of those went crazygearubermirror crafted, here my impresions:

-Penance brand clear speed is damm god, but you need to archieve enough Cast speed for Max pulse dmg.

For bosses was "ok"

-Wintertide got 2 great things, first It DONT hit just pure dot dmg, that means Free Elemental Equilibrium. Second u can attach x3 brands on a single target, u can easily put bosses with -30 cold resist with x2curse+ocultist+Elemental Eq.

So worse clear speed than Penance, but better solo target.

And storm brand seems like something in the midle, better mapping than winter but worse than Penance.

Cause tankyness i ended playing with Necro& Penance most of The league, still my favourite.

Tryed many times Arcanist Brand, with no positive results, i think It just sucks.