You know what you should try?
I've seen a lot of people complaining about the meta (hint: that's never new) but I always like off-meta builds more. So let's list some off meta picks and their pros and cons.
Conqueror 
Pros:
True Damage Yaoi pit
Scary if doing well
Illaoi so you can 1v5
Cons:
Still can't compete with mobility creep
Sacrifice durability
Still able to be stunlocked into oblivion
Hail of Blades 
Pros:
Burst with e-q-proc
Trist kit makes the 5 seconds alright with long range and escape
Still Tristana
Cons:
Still Tristana
Still need Crit items for good damage and speed
Weak in lane
Caster Comet AP 
Pros:
Insane damage
Mixed damage
Crits scaling off AP
Bonus MS plus a safer playstyle
Cons:
DoT
Squishy
Weak autos
Dark Harvest 
Pros:
One shots
Synergy with Q and passive
Later game the better
Cons:
Squishy
Late game
Dark Harvest expiration and time to regain
