I'm currently leveling my second affliction warlock (switched sides from human to blood elf). I fell into drain-hunting with my human, but I noticed how well drain-tanking worked when my VW lost aggro, so I thought I'd try switching play styles once my elf leveled high enough. She is now 28 with 5/5 fel concentraion.
Unfortunately, I can't seem to avoid having my channeling constantly interupted during Drain Life. I can get a whole Drain Soul off, no problems, but Drain Life is almost useless. I keep finishing a fight with 40% health and mana (even against mobs slightly lower than me) My thoughts are:
1) Is 28 to low to effectively Drain-Tank?
2a) Do I just happen to be fighting mobs with faster speeds that have more chances to interupt? (though I think that would also effect Drain Soul)
2b) Am I fighting mobs that are too high for me that have a greater chance of interupting despite Fel Concentration?
3) Am I just incredibly unlucky?
4) Is there a related bug I haven't heard about yet?
5) Am I doing something else wrong?
Just thought I'd see if anyone else as any insight.