Wanting a second shot at an interesting RTS scenario, I pressed restart when it became clear that my initial approach was futile. Surprisingly, in the location of my last remaining battleforge, which had been churning out warlocks, there was a warlock ready at the beginning of the restarted battle. I brought no warlocks to the battle initially. (My side was a carrier full of troopers.)
Note: Entering battle with only a single carrier on the map and a full cargo usually lets you win with no casualties if you win the RTS, which is a good way for a carrier and all its passengers to survive a juggernaught encounter.
Having fun. I like this game.