About wl's i see them as a raid class, solo is pretty boring but can be done, not for me though.
watch videos from this guy: http://www.youtube.com/watch?v=qJmLxDXdTJI
WL's cant heal ? Try to move a bit or kite with brawler (you can change stances in combat), you have shield bash-wl stun-low cooldown-can get improved with trait.
Burg has too many stuns? Try to avoid potting dazes and you will be doing better. Stuns =\= dazes
BA too squishy gets a stun and slow and gets killed? Try to use IP and not rolling with 15k when you are solo, and in case of emergency use brand to remove slow-stun-slow-get at distance again (melee classes).