You might wanna take out the bosses from the units and increase the amount of common goblins in the units. They just look like they need a few more
Taking away the shields from the great weapon wielding big bosses is another pointsaver, but if you want the shield option just in case, keep it.
No big need for extra artillery, really, but you can give the wolf chariots spears as
Grimbog said, they usually pay off.