To be honest, I think it's OP (raise to 15).
But seriously, invincibility for 8 points? I just got on and tried it. I guess it's a good life saver, but, imagine someone on a cannon, and all they have to do it spam the shield to keep from dying. Sounds a bit overpowered to me. They get 10+ points for a kill, and all they have to do to continue their streak is place an 8 point shield. Immediate 2 point profit, and even more if they continued it throughout the round.
My suggestion(s):
- Have a 5 second cool-down period after placing one shield to the next [ignore this if there already is, I didn't do incredibly thorough testing]
- Or, raise the price to something above 10, some price that you have to be on a good streak to profit from them. In my opinion, I think they should be somewhere from 13 to 16 points each.
Edit: Can we have more information about the shield? Like, how large is the shield radius? Is the shield omnidirectional, or does it only shield you from things coming from the direction you placed it in? Does it block entities? Does it block pre-existing entities/TNT's, or only weapons placed after the shield? What is love? Baby don't hurt me. Don't hurt me. No more.