Killer fall damage?

Hello, I'm working on a map that revolves around fall damage and changing water levels, and I need some help with fall damage.


One team (blue) has to jump down into the flooded enemy base and attack it. They start at a half flooded base and have to work their way up. Every point they capture raises the water.
The thing is, I want platforms & such kill with falling damage, so that attackers are forced to fall into the water and have to work their way up.

From what I know, if you fall from the maximum possible height source can handle, you take about 80 damage and that's it :blink:

The other problem is that players will be walking on the platforms, so only people that fall from the top of the hole die.

You can't simply slap a trigger_hurt over the thing (maybie through a complicated system I can use a trigger_hurt?). Any ideas?

I made a sketch of my map. I guess I could show it to give you guys a better idea.



If the fall thing is impossible, maybie it could be done somehow else. Perhaps water blasting out from pipes covering the platform or something. Or a roof like on 2fort bridge, ony slippery.

Blue filtered trigger_hurt probably won't work though. Lets say a red demoman triple sticky jumps outside the hole and then jumps down, or a blue soldier rocketjumps into the killzone.

I'm fine with scouts and dead-ringer-parachutes reaching the top levels though.

The picture is a quick sketch in paint and isn't necessarily what the map will look like. For instance, the first part where it says "this height already kills with fall damage" should be much bigger, so the picture is disproportional.
Still, I hope a crude picture is enough to try help me out