I too am a Keyboard turner, for the most part (180 turns i use mouse). The problem i have w/ using the mouse to turn is that once you press and hold a button on the mouse, you are not able to select a target. I use tab-targeting quite a bit, but in the occasion you need precise selection while turning, what option do you have? If I'm missing something, please help me.
I'm no means a hardcore raider, but I'm always looking to improve as well. Best of luck OP.