Expert keyboard/mouse controls in arena

So there is a scale of keyboard/mouse control expertise in arena that looks something like:

Experts <-----------------------> Clickers

Clickers being those who move and turn with A, D, W and S keys and only click skills with the mouse. I've seen a million posts saying that it is impossible to achieve high ratings while being a clicker. What I'm interested in is: What exactly do experts do? I'm somewhere in the middle where I bind some -very- common skills to numbers or functions and turn with the mouse but move forward with W.

Do experts move only by pressing both mouse buttons to move/turn and only use skills through key binds (and never use ADWS)? How do experts target in arena? Do they click on arena unit frames-like targets (this seems like it would interfere with movement too much to me) or do they tab (and if they tab, how do they handle a feigned hunter with an active snake trap)? Where would an expert hold his/her hands in a default position?

I'm also interested in how keybinds work with characters with tons of skills to use like resto druids. I have macros to auto heal me and my partner so there are 8 keybinds + 4 more for both of our poison and curse dispels + all the various form shifts and skills (losing count here), etc. With so many key binds, it seems fairly infeasible to me to truly keybind all of them and only use that mechanism but perhaps that is the real expert way to go?