I did level my rogue as combat from 80-85 and it was a bit of pain. Remember Uldum quests and mobs, i had lot of downtime, I was taking a lot of damage even specced in armor increase talent and imp recouperate. Also had problems with even 2 mobs at same time, almost impossible with 3 it killing spree was on cd, vanish was my best friend then
in Uldum at lvl 82 i had mix of icc277 gear and some cata blues. And it was taking ages to kill a mob
Now im leveling affli lock and frost mage, both at lvl 82 in Uldum and difference is more than evident. Mage kills mobs before they even touch me, pulling 3-5 mobs with no problem, no downtime for mana or health. Dont even need to use all of slows frost mage has, mostly only pets freeze. Lock is different story - Dotting everything in range, taking heavy beating from them and end up with 5 dead mobs and hp at max, need only 1 life tap to regain mana. no downtime really.
So, my question is: Was I doing smth wrong with rogue? That downtime was killing me, rogue was just so weak against melee mobs, taking so much dmg (sometimes 15-20k hits) and mobs die so slow.. It was like their armor is so high, maybe thats the reason they are easily killed with spells than with white hits