Doh! I was just reading through the Tome of Adventure again, and I spotted a significant error in the way I handled Theda’s ‘dream’ encounter.
Instead of playing the goblins as Henchmen NPCs, I played them as Standard NPCs. This made them a much tougher proposition than they actually could and should have been. Of course, the orc would still have made for a strong opponent, but Theda and the other human could have played things a lot differently, even in the space of the few rounds the combat lasted.
Another lesson learned – it never hurts to go back through the rules, even when it seems like you have them mastered!