While there may be a number exercise in this sort of staff-battlemage idea, you're still contesting with elemental resistances and immunities, ignoring the exponential growth of physical-based damage, and are misinterpreting a few things (the removal of socket progression, damage calculations, bonus applications, etc).
If you want consistent optimized damage then a Crit-based 2H-STR LW is what you're after, with no real competition short of Source Spell burst damage.
