Distraction mechanism is good and all, but I think there is not enough space on the map (every thing is just so close to each other but the environment is more natural that way), so I think neutralizing the enemy will be more beneficial, but how? Well the traditional way will be to put them to sleep, but if I rethink of kobold with weight gain mechanism I think of cakebolds (search cakebolds Fur Affinity) magic cake with kobold shape that will feed them self to the nearest enemy, raise their fat level by 1 and if you have max feast level they will be too fat to move (neutralized).
Wow that's a long comment, goodluck :)