Use the Skyguard Bombs to destroy 15 Fel Cannonball Stacks.
We're still having problems with those flak cannons, <name>.
Don't get me wrong -- I think that you did an outstanding job the last time out -- but, that doesn't change the fact that those damned demons seem to be replenishing their ammo supplies faster than we can knock them out. And that means we're having a hell of a time getting our people through there, not to mention the risk those demons pose to Ogri'la.
What do you say? Want to take another shot at it?