Lake of ill omen ledges

[gredesh]

Was having a problem with the ledge around the whole lake, it's a 2 point sharp edge on the z axis. There's also a 6 point ledge in the sarnak fort throne room. The problem with the one around the lake is that if your z-axis is lower than the mob chasing you when he hits that ledge, he goes under the world and it's hard to get him to come back up. With the 6 point ledge things go under it no matter what and stay there.

What I found is that if I change the rule Map:FindBestZHeightAdjust from its default value of 1, to 2, the mobs won't go under the world anymore. However to get them to not go under in the throne room, you need it set to 6. So far just kiting mobs over hills and things I haven't noticed an adverse affect from having it set to 6. It seems better if anything. Is there anything wrong with having this set to 6? Does it eat more cpu? Or are there instances where funky things will happen?