Being as I will probably vote Greens in all top three spots, I'm not too worried about how far down by preferences will flow. Once they hit Labor they're pretty much dead in the water.

The Climate Sceptics are crazy for sure, but for me, the religious nutcases are more likely to have a direct and immediate impact on the lives of me and my friends

Have you looked into the Climate Sceptics, or just looked at their name? Some of them are Moon Landing Fake/birther/truther types.
Personally, I'd trust the CEC or One Nation over them.