I've also been looking at this army of recent, with the new rules, high numbers and the ability to ally with the trolls and still benefit from both army rules is a bonus (currently with the GoT rule pack anyway). Here's a sample list:
Warband 1
16/18
The Goblin King
8 Goblin Warrior with Two-handed axe;
8 Goblin Warrior ----
Warband 2 16/18
Grinnah
8 Goblin Warrior with Two-handed axe;
8 Goblin Warrior ----
Warband 3 16/18
The Goblin Scribe
8 Goblin Warrior with Two-handed axe;
8 Goblin Warrior ----
Warband 4
16/18
Goblin Captain
8 Goblin Warrior with Two-handed axe;
8 Goblin Warrior ----
Warband 5 7/18
Goblin Mercenary Captain
7 Goblin Mercenary ----
Warband 6 7/12
Goblin Mercenary Captain
7 Goblin Mercenary ----
Warband 7 0/0
Gollum ----
The Trolls ----
Warband 1
William (Bill); Campfire;
Bert ----
998pts 87models break 43 25% 21
This is still a high model count list, with monsters for some hitting power and Gollum and Bert to both counter high fight models to pair with bill or the goblin king. Another good idea is to throw in some denizens of mirkwood (bat swarms and spiders) or drop one of the trolls for a catapult to shoot into engaged combats and charge in a throw models down the line to pile into. I would recommend checking out the Green Dragon Podcast on soundcloud, their listener list request evil has some great insite into using goblin town and list building. (
https://soundcloud.com/the-green-dragon ... uests-evil )