Combat movement is a waste, don't get it. You'll find mobility invaluable. Most people pick up at least 3 ranks of combat focus, some can't get themselves to spend the points on the last two ranks, but I have all five myself and find it well worth it. I have two ranks of parry mastery but that is more so I can better protect people I hunt with or escorts/kids for adventure guild tasks. I'd suggest cunning defense, I have 4 ranks of it and it is one of the cheaper combat maneuvers to train. That is the basics pretty much, after that it is a matter of personal preference I guess. I've picked up two ranks each of charge, hamstring, bullrush, and subdual strike just to defend against them. And four ranks of sunder shield to rid a few annoying creatures of theirs, also useful to help other people but that is more a perk.