RCFREEK

Im running 2 turns on the high end and 1.25 on the low end. My engine seems to blubber in the mid-throttle range, but the transition is ok and i dont get the power i need. If i take the low end to 1 rotation the power n transition are awesome, but the engine quits n i think its due to being lean. secondly, on extended downlines, my engine quits. Is it becoz it starves with the clunkline being at the back, or is is due to being overly rich? pls advise.
I fly at 700ft asl and am using a 22x8 msc prop. I have 25 tanks of fuel thru it as of now. oil blend is 33:1