Artillery is extremely weak in general. A volley of canister at rifle range upon a unit with 2% cover = 9 casualties.... what.
Though I do believe that artillery fire greatly reduces the morale of units under fire I think they should still have a bit more power beneath them.
and they drain wayyyy too much condition when firing.
I think Artillery should receive a universal increase to kill rate at all ranges by atleast 60%, and have their condition drain when firing cut by 75%.
EDIT: Offtopic sorta, but I think Skirmishers should also receive a slight increase to durability to rifle fire, and cavarly increased charge lethality.