http://ptr.wowhead.com/item=96413 &
http://ptr.wowhead.com/item=96516#comments will be probably BiS
Wusholaay because it's a solid trinket, no real downsides, maybe hit isn't good because we get hitcap from other gearslots already.
Cha-Ye's because it grants crit, personally i think Crit will probably surpass Haste with BiS Gear and it only procs from Crit Spells, so it's gonna be quite decent for Elemental.
Lei shen unerring vision is far too unpredictable because of the ppm system to be of any use for Elemental.
Breath of hydra will have a too low uptime, LoC has shown that DoT Trinket aren't that great for Elemental.