Nope, Mortars are unusable piles of steaming rodent gak...
I
can win most encounters vs. archers & mages with my axe-loons, except for those instances where I'm 1000% terrain screwed. (ie: even doggies w/a 100% HP boost + phoenix is still an auto loss because it'll take 3 turns to get anywhere, while everyone has to walk in single file)
On the other hand, I have
LOST OUTRIGHT battles vs. all LI+LR with Mortars!!!
And the terrain was even in my favour!
MORTARS JUST PLAIN SUCK
Plus, we get the ability to auto-produce 'Zerkers by just finishing Ch.6, as the Dwarven Bulwark is basically a 'must have' AW for it's massive squad size boost. Meanwhile, mortars get
nothing from AW's until finishing up Halflings - a whopping 5 further chapters into the game...
I currently have so many 'Zerkers just sitting around that I don't even care about throwing them in the dreaded Spire of Misery - I seriously can't kill them off fast enough at this point!