you've made a few misconceptions;
Deep wounds weapon damage is your weapon damage buffed by your AP, not the base weapon damage, I.e its the number under melee on your character sheet, NOT the number on the weapons tooltip. So it does scale with vengeance.
DW damage per crit = (Weapon DPS + AP/14) * Weapon Speed * (0.16*pts in DW)
Revenge can be dodged and parried. You've either misread the tooltip, or confused it with Overpower.
Dev has high Crit becuase in addition it gaining crit from the same sources as everything else, it aslo gains 15% crit from the Sword and Board Talent, thus relative to almost everything else it's gonna have a higher crit rate.
thunderstruck adds 10% damage per stack to SW, generally you will not be using TC on CD for single target, at best you'd use it every 12 seconds to refresh a rend meaning you would use SW every 36seconds, as oppse to every 20 so for a 30% increase you're using it 45% less. this is of course assuming you ignore the 4gcd SnB proc cycle and prioitise using TC and SW on CD.