Seriously though, what the fecks the point of soloing in an MMPORG ?
To get high enough in level to be of value in a real group for group raids etc.
The real multiplayer stuff in all these sorts of games is at the higher level. Having said that I do party up whenever I get the chance.
I found last night that I am struggling to level my assassin at level 19 as he relies on backstabbing which you really can't do solo as the target keeps turning to face you. So the assassin needs someone else there to distract the target but repetedly hitting it. He can then get around the back and do his thing.
On the other hand my Chanter (a combat priest) and my Sorcerer are both levelling fine at levels 22 and 26.