So put together
FURY 4/5 (I don't see him having any more then 5 FURY, probably 4)
2+ POW 10 Lightning Storm 3"AOEs (as per the spell). Might be an alternative to normal shots with higher POW.
A main gun with unknown traits
2x On hit center a 4"AOE on Target and Knock down models under the AOE
Self Healing of some sort
And the Argus's Animus will do almost nothing for this beast.
Am I missing anything thus far spoiled?