At level 60 I get 5,000 exp per pull X 4 (raf) with about 2,000 exp for non rested non raf leader, at the seige engineers in epl. So 22,000 total exp for under 1 minute, tag boosting. Mobs repop in like 7 or so mintues but by the time you loot and drink it goes fast. I maintain between 60-70Kexp/hour without any problems.

But it does come down to what you really like, if questing is like a job then why do it, if grinding is like a job why do it?

I like killing mobs lol.