Originally Posted by
Hakto
You are looking at it wrong.
Hyjal and Vashir are scaled to start at 78, not 80. The base exp from level 78 quests is approximately 5k more than level 80 Northrend quests. Level 80 CATA quests are 8k more than level 80 Northrend quests. Mob experience is also similar, a level 80 non elite will give 1200 ish exp, a level 78 non elite in CATA will give 1600 or so at 80. When questing there is no point to doing old world quests past the first turn in
If you have a pre-organised group which knows how to speed clear instances you will gain double the experience of CATA questing from Northrend Heroic Dungeons. Use this to your advantage.
If you have a pre-organised group which knows how to CC, interrupt and kite, you will gain an extra two fifths of the experience from CATA dungeons compared to CATA questing. If you PuG you will do worse for exp than questing