I'm lv 67 MCH atm, and almost have all abilities, so I've figured it would be neat to pack up and start to tighten up my rotations and so. The problem is that I couldn't find any precise guide, so I've thought of asking directly.

1) The combo sequence
I get that we - should - do 1>2>3, but what if 2 doesn't proc? Should I keep hitting 1 until it does? Should I advance on the combo only if the next is procc'd? (I realize reloads are good to ease this up)

2) Reloads
When not buffing for WF phases, should I use them on cooldown to guarantee successful complete combo sequences?

3)Food
What is the best one to have?

4) Overheat or not?
Well, I know there's a huge detailed thread about this here on the front page, but there's no TLR, how much dps gain is to overheat?