Honestly I don't upgrade with anything other than quest gear cause I'm LAZY! I can't be bothered with upgrading 5 characters. In fact, I don't plan on paying special attention to my gear until I hit lvl 70, when gear really matters.

At low levels I just don't believe its worth the effort. Almost like your setting yourself up for disappointment cause the gear really wont make a difference at all.

IF I HAD to upgrade anyone on my team between 1-60 it would be my Tank, thats it.