I've recently picked up Primal terrors and i've been playing Anamag/Kallus1 but im ready to branch out. I only own primal terrors so, i'm look to stick with that theme. I'd like to expand into Kallus2, mainly as a very hard 2x Judy drop.
Here is what I came up with. Kallus2 -ArchAngel -Golab -Ammok Spell Martyr Chosen Warmongers -Gorag Warmongers Hellmouth Hellmouth
Looking to the archangel for the fire continuous effects to trigger the feat. Golab is my overrun target. Battle lust turns any of my units into heavy hitters and warmongers have plenty of crowd control.
With the AA and Kallus's 1 spell as your only ways of spreading fire, you are going to be limited to what will be set on fire. The AAs D3+1 shots, even though they are AOE 3 are still too random for my liking. Best case you get 4 models set on fire, worst case you get 2 models set on fire. And if Kallus is forced to cast his only offensive spell to set things on fire he won't be casting fury since he most likely will need to boost to hit with his fury 6.
I've been inclined to take at least a min unit of croak raiders to set things on fire in my Kallus2 lists. And so far they have done fairly well. With AD they have a higher chance of attacking first. The only way to easily achieve this would be to drop out the AA to a carnivean + max raiders + 1 point of something else. Kallus doesn't mind the extra armor from SG and with max raiders you ensure that you will get enough enemy models set on fire for his feat turn.
That's my two cents anyways.
P.S. I've been trying to include the AA in more of my Legion lists but Kallus2 was never one that I could make a list that I liked with the AA.
P.S.S Since Kallus2 has 0 defensive spells, it makes the (almost mandatory anymore) blightbringer that much more pivotal to the survival of the ogrun. Any dedicated shooting list (read lots of pow 12s whether boosted or not) will make the warmongers sad pandas. The Chosen should be ok, barring any grievous wound shots or dice spikes/boosted damage shots.
I haven't had a chance to get any games in with Kallus, but based on theory, I'd say that the Archangel works better for beast-heavy Kallus2 and the Blightbringer works better for infantry-heavy Kallus2. Chosen, Warmongers, and Hellmouths all would love the Blightbringer a lot more than an Archangel.