BiS weapon

Hello i want to donor a weapon for elemental shaman.
I know that
http://www.wowhead.com/item=71086 is BiS weapon but not available

Here is my question after legendary staff
http://www.wowhead.com/item=78477 this staff is BiS? : d

Thanks for help :*

Ti'tahk is better regardless. Though the heroic version isn't out as far as I remember, but the haste helps greatly, and the stats are far better. General rule of thumb, DS gear is BIS for all classes.