Its a very fine line in perth. some days when there is too much south in it, you cant get a good right all day, sometimes with a bit more west its smoking!
Technique has a lot to do with it. lots of weight on the front foot. keep the kite sheeted in as far and as hard as you can - it will move to the edge of the window, and pull you further upwind. you need smaller kites or less wind - cant do it overpowered. Im same size as you, and usually ride an 8m 2012 reo, with a 5'10.
You have to set the waves up from further out, cant just spin when you see one - it takes 10 or so meters to set your line and get the kite in the right position.
Dynabar or similar - it seems like you already have one.
Below is a dodgy gopro vid of one session at trigg last season - I pretty much only go right. some waves i get a decent angle on, others I cant get close to the face. i set up most of them from a fair way out, but hard to see that with the fisheye effect of the gopro