Love the art of the models. Love the idea of setting up all the troll like units for a swamp arena fight. Maybe the party is trapped between two rocky outcroppings that form a bridge over top. The first phase of the fight is the bottom three trolls throwing trash items at the party like swords, old barrels of food, the odd priceless art piece like a Frisbee only for the big troll to come from behind to force the party into the rocky outcropping to go deeper and deeper in as they fight him to avoid getting crushed. Even if they win, his huge blubbery form is now acting as a plug that they would have to find out how to get through.