Which CoT maps have healing/damage crystals?

I'm putting together an arc and am trying to find a Oreg map with the buffing/injuring crystals in it but trial and error is getting me nowhere. Can anyone point me in the right direction?

Thanks!

They're random as far as I have been able to tell. I've run the same maps over and over and found none that either always have crystals or never have them. The best I could do was find maps where the crystal spawns were somewhat predictable to avoid annoying things like pain crystals stuck right at doorways (which really annoys Stalkers).

Thanks for the feedback -- that's a bummer if it's random.

If you're worried about a glowie being unreachable due to the pulsing, I haven't found a spot yet that actually happens in.

If you're worried about an ally coming down with scrapperlock, well, keep worrying.

If you're worried about them being unsuitable for some other setting, I think the Infernal temple doesn't actually have any crystals, but it's also a different palette.