I climbed at the Mt Cooke cave the other day (one of the only featured granite roofs in perth) and its tick free and cool in summer
managed to piece together some of the solid holds in the roof
for what its worth V10 *contrived*
start on the good holds at the back of the cave bicycle kick your way through the chalked up holds to the lip, swing your feet over to the opposite boulder, then up the slab.
Fun hard climbing for what its worth