Yeah, I had taken out most of the enemy forces by then, simply because I knew it would be tricky to get Joshua while there are many enemies that can mess it up for me. Just in case, I also had Seth rescue Natasha until I knew it would be safe for her, just as I was about to send her in, Joshua killed Gilliam.
Normally I'd send Gilliam & Seth out in front just to soak up some attacks and use them as decoys for the weaker units to come in for the kills without losing HP (or as little as possible). This had been working fine, until of course, Joshua decided to change his luck