Regarding Cleric Leveling Grouping / Solo

[Hex]

I posted something similar to this in the Priest forums the other day, and didn't get any response. Basically right now I'm lvl 21, and parked in Unrest, grouping for exp. Around what level should I be leaving, and where should I be heading.

Also, I have a lot of play time, and sadly, there's not always a group somewhere, so just wondering, if there was a leveling scheme / path, for a solo Cleric.

Would love to hook up with a high level, high knowledge / skill Cleric in game, and pick your brain. Any help would be greatly appreciated. Thank you!