Re: Vanguard... what an improvement
Solo - Non-Quest - Possible, even fun some times, but slow
Solo - Quest - Much faster than non-quest, but not as fast as grouping
Group - Quest - Faster than Solo, but can talk a while depending on how many morons are in your group.
Group - Dungeon Crawl - Fastest (helps if quests included) and fun if you find a good group with not too many deaths...
I went from 26 to 28 in 2 days by running Trengal's Keep (TK) - One day I was just crawling, then next day I did TK 1-5 (still need 6 damn it)...
On Any Given Sunday!