Chaos Assault - Survival Map

Description
Chaos Assault is the author's first Survival map, and wishes to express his thanks to dark40k on helping him out.

This map will pit the player in the middle against 10 waves of chaos forces ranging from pitiful cultists to masses of demons and chaos warriors, each wave more intense than the rest. With the help of the Demonhunters Grey Knights' and a 'land raider' who are walking around supporting your troops you and your imperial guardsmen are into a pretty long and harsh battle! Since this is my first survival map please give me feedback on what to do to improve it.

*FLUFF*

The Chaos gates that once held back the warp spawn of chaos are now becoming weak, soon they will be a gateway between the warp and the material world. The imperial guard that have long watched over these gates have rallied their forces and with the help of Inquisitor Toth and his demonhunters they plan to defeat the chaos forces and seal off the warp for good...