Of the easier slab climbs at Arapiles, Brolga is the best. Classic climbing! Disclaimer: When I did this climb I did not lead it or pitch it out properly so my descriptions may be off. Begin at the middle of the right Watchtower Face at a clean band of rock.
P1: Climb up for half a ropelength and belay at a ledge. Gear is marginal on this pitch.
P2: Fantastic climbing and a long pitch. Head towards the tree on a large ledge.
P3: Wander up to the top from the left end of the ledge.