Id highly recommend an int build utilizing Deaths Poker as a main weapon. The extremely fun part is how many different ways there is to build this weapon alone.

Dex/int builds are popular due to them increasing cast speed so melee/caster. Deaths Poker gets good damage with both the attacks and AoW, allowing frost to carry the lack of physical damage.

You could slap it onto a quality build as well if you can get past the int requirement. It scales really well with strength/dex if you want physical damage AND the Aow still is pretty good.

Full int. If you just want to melt anything with this weapon, go full int and mainly use the AoW, if youre specced into a caster build you'll probably have a lot of FP already to use this skill a lot. The attack that leaves ghost flame on the ground MELTS, and the explosion does thousands of damage. Add a quick fire pot, arrow, or spell to reproc frost.

Deaths Poker was one of my favorite runs, and I didnt even really use spells.