Excellent post Jadecritic!!!
I usually just read, but I had to give you kudos.  I've only been playing this game for about 7 months now, but I wish I had this guide to learn the ins and outs of teaming up.  Unfortunately I had to learn the hard way, but I've since gotten tons of compliments from former members of teams I have run.  Sending tells and indicating the levels of the mish are definitely key to finding teammates.