I'm sorry if this is a repostx100. And if there is a sticky somewhere that explains this please link it.

Okey, so while waiting for my new computer im browsing this site pretty much, so I'm prepared when I start playing.
My question is what the best way to level is. I got good knowledge in how to level single characters, but my guess is that 5boxing is a whole lot different xD

Instances all the time? Questing? Grinding random elite mobs?
I was thinking that I should do almost all instances atleast once to finish all the quests in there.

And while I'm at it, is 'warrior + 4xshamans' a good combo?