Like Mori said the majority of a hox damage is fire magic. So you would want the kuth sword with the most intel on it.

You want to do your hellfire breathe and burn to death every time they are up and follow up with pillars as these are the bulk of your damage. Fire lance is also fire damage and great as part of the rotation. Inferno is best casted when your stack reaches 10x.

Hell strikes and molten steel slash are just filler combos that generally wont be used unless you get the t5 rune then HS will replace pillars.

Body and spirit wrack shouldn’t be used in a rotation except to drain a targets mana.