Welcome to 2010.
Here is a solution to GeoDefense Swarm Hard Level 10 sent to me by Telo. I will hand you over to Telo now to explain what is happening...
"The first pic shows the route the creeps take, I drew on the route in pea green to show it clearer, and the second pic is my score at the end. I'm going to have another go at it soon! Hopefully do better second time."
Telo wiped out 239 waves using this strategy, which kicks the arse of my solution. If anyone can do better and is willing to share then shoot your solution through and I will post it.