Heh, try that in the current metagame. On broken tower you're likely to see Nr/Tranq teams either side of you on a very regular basis. Not something I'd want to attempt right now.
Like I said, it's because a very large percentage of teams in HA nowadays now run Nature's Renewal and Tranquility in spirit-based builds which would just rip through SOMW unless they can get rid of those spirits very quickly.
Also SOMW took a bit of a nerf in terms of damage, but an 8-man team would still easily be enough damage. In answer to your question, yes they do all have Signet of Mystic Wrath, and are all carrying various bonds which they cast on each other.
It was kinda fun to run, but quite tedious to set up, and everyone had to be very quick in setting up the bonds before the matches started. If all set up properly, a lot of teams were unable to deal much damage at all to SOMW teams.
