+1 smite :~ + 75 dmg
+1 holy shield :~ +40 dmg
~ +300 def (more with exile setup)
HolyShield level -- Block bonus
27 -- 37%
36 -- 38%
45 -- 39%
60 -- 40%
1 hard point in holy shield gives final level 28+
20 hard points gives level45 block breakpoint, thats overall +2% block, so you save ~ 3-4 points in dext to maintain max block.
~ 3-4 dext saved = 3-4 more vita = 9-12 base life = ~ +20life after bo
1smite/20holy shield = +20life / +6K def
20smite/1holy shield = +0.7K dmg on smite
and defense is useless vs many duelers (smiters, foh, VT, hammers, any sorc but melee, necros, traps, ele-druids, widowmaker builds...).
Obviously you have some experience in duelling with VT, so i totally trust you. Actually i skilled my VT with max HS according to your guide.
But still, i dont understand

how did you manage to get 700 damage? which calculations did you use. did u factor in pvp penalty + 50%dr etc too?