You can go to where they are without dying because the water only damages on the top and only does 50dmg per tick. So you can jump into the water and go down without dying and kill whoever is camping.
1:that's the point this post exists because there is no point to it an is a fail in map design2:you just posted some obvious facts about it which I think most people should've figured out for them selves by now3: this post was made October 8th 2014 you posted in this 6 months later I'd say this post is pretty well dead