If you can kill fast and handle that much of a mob in Dark Priests before you get overwhelmed, it sounds like you are in the right place overall. I would suggest using the Eden Buffs as a timer. 30 minutes of DP killing, back to town for a break of shopping/selling/window browsing/whatever, talk to some friends or randomly help a newbie/returner, then redo buffs and get back to DP.
I agree with th most part of this post but you see all this talking and helping a noob and shopping and all that. I don't recommend it.
I say, when you grind, GRIND HARD. 30 minutes is how long your supplies should last (at least) before you have to visit the city. When you visit the city, just restock, warp back to leveling spot and pump the gas. Listen to music so its more like you are listening to music and grinding rater than grinding and listening to music. Add some random guild chat or chat with friends just a sentence or two, no need for long conversation, and before you know it you'll be so close to a level or even already leveled.
Key to grinding in my yes is persistence and focus. if you do anything other than level when you are leveling you are likely to see a 50% to 25% reduction in your leveling speed. So just focus and grind.