G’day!
Bouldering is still fairly new to WA, with a certain Ben doing the hard yards to get some areas established. As such, is still fairly undeveloped and there’s plenty of routes waiting to be sent and documented.
Most hard stuff is probably around V7-ish, but have a look around for the bouldering mini-guides in this section and hopefully you’ll find what you’re after. Kalamunda is nice and very technical, Boulder Rock is awesome but might be a little easy for you if you’re a strict grade chaser.
By the looks of things on this board, there’s some cool stuff happening around certain caves, but I don’t know where they’re talking about myself… 😉
Cheers!