1. I don't think I'll use dots much, my sp are more for death auras/negative energy bursts/no-dc spells like power word(because sp are not much to keep dots for a long period), so I would consider tenser's... +4/+4 str/con is too good to be dropped.
Also, I've noticed that you are not considering stances. Will we fight in fire right? +3 to hit/damage and +0.75[W].
If we use fire stance+tenser we achieve the same 50 score of strenght and lvl up wisdom instead, in this way we can have better stun dc and orchid/lotus/EIN.
2. Is precision better than PA?
3. About gears: I agree in general. What about crafting +45 hp boots conc opp and then use frost helm and tharne goggles?