Rogue arena question
 

Hello there! Its my fist post and its about Assassination Rogue.
I have a problem because i don't really know what trinket should i put in my eq.whats the best option for him. Is it:
Bloodthirsty Gladiator's Medallion of Tenacity
with any chance trinkets like
Bloodthirsty Gladiator's Insignia of Conquest
Bloodthirsty Gladiator's Badge of Conquest

or using
Bloodthirsty Gladiator's Medallion of Tenacity

isnt it worth at all and i should put trinkets like this two posted up there at once?
Bloodthirsty Gladiator's Insignia of Conquest
Bloodthirsty Gladiator's Badge of Conquest

My info:

Im Undead Mutilate/Envenom Rogue PVP

P.S.: I don't really know how to beat Mage or Warlock too :( If u have some tips about killing any kind of classes with it I would be grateful so much.