I'm sorry I couldn't run through all those 15 pages, but please explain:
I created an Assassin. I haxored her to level 80ish.
I gave her an armor that makes her nigh immortal on hell.
I gave her two copies of a dagger (one to each weapon setup) that
-deals 1-4 dmg
-has lots of AR enhancements and slowdowns and freezes (for easier dmg. counting)
- adds +28 to BF (cumulatively) so that BF is on 29th now with the 1 solid point.
One setup has no offhand, the second has a buckler with lvl 31 Might aura and +500% something Enhanced Damage.
Other than that, the lady is all naked. Particularly, NOTHING except the shield adds ANY damage, elemental or +enh.dam% or whatever.
The damage done to monsters around hell is only about ~ 40-50% greater WITH the buckler than WITHOUT. It should be about 10 times greater if your calculation is anything around true.