Fireball-oriented Fire Mage Build (guide)

[dannyvye.com]

https://steamcommunity.com/sharedfiles/filedetails/?id=1454079424

Short snippet:

Introduction
This is a guide on the Conjurer (Fire + Spirit) build focusing on fireball attack (fire-damage staff with Ternion attack skill). I like fire mage and I like this style because it is more fun, it fits more to the fire mage fantasy (I think) and it's strong, compared to some other styles such as Eruption or Volcanic Orb oriented.

Pros:
Staff with Ternion attack scales well, better than spells. The reason is that a spell damage only scales with int and +% elemental damage while staff with Ternion attack scales with the staff as well. You can also enchant staff for debuffs etc
Very good AOE while still good at killing bosses
Relatively tanky, compared to other mage builds. No need to kite melees.
Two life-saver skills: Death Ward and Stone Form.

Cons:
Difficult to have a balanced fixed gear set -- need to swap gears depending on the zone / boss
Not the fastest boss killer

[Pannathrax]

wraith shell now scale properly and the damage absorption makes it incredibly tanky

[dannyvye.com]

Right, but even with 1 point in Wraith Shell (which means level 5 with +4 skills gears), my Lich King rarely dies anyway. So I just feel there is no need to put more points there with this build.