For my Goblin Militia army I decided that to reduce the number of figures I would need to build (let alone paint) I would have a core of slightly better troops.
There is the Town Guard comprising a Captain, two ranks of Goblin Spears, two ranks of Goblin Archers and a Level one Spellcaster.
The Goblin Slave sprue includes a Goblin without armour who I thought would be suitable as the body of the Spellcaster. The head is one of the hooded ones from the same set. The arms are from the Frostgrave Cultist sprue.