Don't know if it's this one (can't test it myself) but atleast the readme in the download mentions a bunch of changes, including "1 more set of cliff climbing ropes". It also doesn't say anything about allies attacking so maybe this one is different from the one you have checked.
https://et.splatterladder.com/?mod=mapinfo&idx=7249
Should give it a shot. The current one uploaded on the server is balanced horribly.