A minor necro : How do I switch guard with my Jedi Tank ?
Did Athiss a few days ago. Was interesting. I thought I'd be bad, but in the end I wasn't. It turned out to be a good training run for me (with my very first tank character, plus I normally don't play melee classes).
I think that I should do both Hammerstation and Athiss a few more times (did Athiss with a Commando who was fairly new to it as well, plus our companions, makes 4, everyone at level 21 / 20).
If i am understanding your question correctly, all you will need to do to switch guard is select another member of your group & throw the guard on that player. As long as said player is not guarding or being guarded by someone else you can switch guards as needed.