As there is no detailed information about the artillery strikes, my experience while playing commander is the following:
- Mortar barrage is useful for short, intense small artillery fire on a small area with lots of enemies in. Very useful for clearing out capzones.
- Regimental gun-barrage is useful for areas with more spread out enemy inf and armor in it, not that useful to clear out capzones but useful for blocking paths since it takes quite long for it to end
- Katyusha's for a wide area, powerful against enemy armor and hidden enemies camping outside
- Mortar barrage is useful for short, intense small artillery fire on a small area with lots of enemies in. Very useful for clearing out capzones.
- Regimental gun-barrage is useful for areas with more spread out enemy inf and armor in it, not that useful to clear out capzones but useful for blocking paths since it takes quite long for it to end
- Katyusha's for a wide area, powerful against enemy armor and hidden enemies camping outside