If this was already discussed, please delete this post.
I was doing some math this morning, and it looks like the Fire (Sword / OH combo) gives more stats then the two staffs, but less Int
Aluneth (Arcane) and Ebonchill (Frost):
551 Int / 766 Stam / 340 Haste / 2786 Mastery
Felo'melorn (Fire - Sword):
219 Int / 328 Stam / 146 Haste / 2784 Mastery:
Heart of the Phoenix (Offhand):
287 Int / 431 Stam / 117 Crit / 265 Haste:
Totals: (Difference from Staffs)
506 Int (-45) / 759 Stam (-7) / 411 Haste (+71) / 117 Crit (+117) / 2784 Mastery (-2)
Interest the Hast/Crit gain from the Sword/OH, perhaps the 45 Int loss may counter that, It's a small amount ~.25% increase of haste, a .35% crit increase. Small amount, but interesting considering I figured most legendary DPS weapons would be the same.