It all depends on the player skill/pet/equipment and the skills you bring up first in your char.
I would say that from the 3 Evoker is the most likely to win in all levels.
Why i say this? Because Sorc only start to show it's real power at job level 40 from the second skills... it get's it's auras, seal and might, Breeder i would say that when he gets to R3 it starts to show it's power but evoker since it's the one that depends less on the pets... kicks ass from the start.
But any class can kill the other... under R5 it all comes down to the first thing i sayed, player skill/pet/equipment and the skills you level up first, after R5 when you have skills maxed only the first 3 matter.
I have killed evokers/breeders when my sorc was R2/R3 with no problem, just used a bow, and had my pet (chicken at first, rp after i tamed one) hit the other player... if he attacked me i would just kite him and shoot an arrow from time to time and having my pet do the damage, if he went for my pet i would just have my pet run around and i would use the bow/magic skills.
After they learn how to duel me (the ppl i would duel the most) i had to wait until R4 to start to have a 50% chance to win again
Just choose one you like, learn to play with it and have fun playing... in pvp you win some and you lose some but if you enjoy playing with your char even when you lose you have fun

... well at least i do
