So I was leveling my lowbie shadow priest through ashenvale, and I noticed something odd when I started on the quest to kill infernals, lashers and felguards.
Mind Flay kept getting resisted. This didn't happen with any of my other shadow spells, but at least 60% of the time, Mind Flay would be resisted. It got to the point where I was much better off not using it at all, since the constant resists were eating my mana.
The demons in question were my level and up to two levels above me, and I had the +hit% talent filled, but it seemed like that one spell in particular was essentially ineffective on certain mobs.
Has anyone else had this problem?