Any advice? I'm in pretty good gear, haven't played since C1-infancy of C2, and I can't quite remember how best to level. I recall doing Cruma, but I doubt at this point there's enough lower levels running around to keep consistant cruma groups running.
You really should be in a clan academy - it'll benefit the clan and make getting parties/buffs a lot easier.
I think soloing in fields is much better than it was when you last played, the herbs heal, recharge, and buff. I really don't think it matters too much where you go -- it's good to avoid dagger-resistant mobs (or archery resistant if you're using a bow), and of course to align with quests you're doing for $$.
At 28 if I'm not in the dungeons, I tend to go with Execution Grounds or Partisan's Hideaway, and do the quest for cargo boxes (Sophya in Dion).
If you're a girl, go to any town and open the Hero list. PM the person who's Titan Hero and try to become his "perfect good girl". He will make you lvl78 in about 1 week.