They only use artillery in direct fire role. Mortars have AI templates that let bots see far away targets (unlike normal mortars intended for use online). They mostly use nobile artillery, because they can drive it close enough to targets to fire at them effectively, but they occasionally use static guns, like Nebelwerfers on Op. Totalize and Sidi Bou Zid, or 25 Pounders to fire at enemy tanks on Alam Halfa. They only fire on targets they see tho, never on player spots.