Suicide hobbit spam really helps on the last level.
It causes him to stop where he is to shoot the hobbits which leaves him open to a continous barrage of arrows.
the first orc mission is a huge leap in difficulty. the next few missions are a lot easier.
A tip to beat it and many of the other missions:
Just rush them at the start with hobbits. It usually works.
Initially was fun but got boring pretty quickly.
After the second stage i was just praying the next stage would be the last so i could get the badge and play a game thats fun.
I managed to keep the temple up at full health right till the last boss but got 1 hit killed when i missed the throwing stars part...
 "Ned and the Dots Contest"){kind=icon}
 "Epic war"){kind=icon}
 "Epic War 2"){kind=icon}
 "Typing Ninja Hunter"){kind=icon}
 "Knightmare"){kind=icon}