As a straight out affliction fanatic, I must say give affliction a chance, think about this: if they have a healer next to them healing them, they ARE going to kill you unless you too have a healer, no matter what spec you are.
Also think about all the damage you are throwing to your enemies, and most of the time, killing them after they've killed you.
If you have SCT, you will have an option to display a "Killing blow!" message everytime you kill someone, wich tends to appear a lot on my screen when Im waiting for the spirit guide to resurrect, and I dont even have 3 epics.
I believe you should focus on throwing all the dots you can at the biggest amount of targets you can, to, obviously cause the most damage possible. Top priority specially around healers should be Unstable Affliction, since it does a great amount of damage, and an impressive effect on the dispeller, if they are dumb enough to do so.
Dont give up on the affliction locks, specially with your FSW, since it would be really bad for destruction.