Assisting the tank would probably suffice.

As far as Thaddius with two characters is concerned I think if you had your characters strafe to be outside the groups when the polarity shifts would give you SOME time to move them if their polarity is different.


Something like this:


(+) Heal -------THADDIUS ---------- DPS (-)

**** Polarity Shift Imminent ****



<Both Characters Strafe Right>
____________________________________<----moves DPS(-)
Moves to -------------THADDIUS-----------
(+)HEAL moves ---->