I have done a few routes on this wall including the link up of iron curtain to screaming tribesman. The 22/23 pitch is sweet as and soft but the 25 adventurous and bouldery. After the over hang its a slab hike. I added a U bolt to both anchors on the overhang to make them safer.
I also added a new route this summer that avoids the 25 pitch of screaming tribesman and rather than going right you blast straight up on like 11 Us through a totally sick pitch of pumpyness at grade 25 (makes going right look boring but is easier to me going straight up). The route then hikes left for a pitch of bush traversing and links into four new pitchs to the cooee lookout. The route is called Asteroids and the grades are 25,19,22,24,20,23 for the new climbing from the junction of screaming tribesman and is all Us and bolted belays. I think nitro express is just ok and that with iron curtain link up this new route is two to three stars almost as good as evolution.
Enjoy! If you do it let me know how you go or PM me for a topo.