Re: Mouse repeater not working
Again, based on what is working in your profile, I can only see a single Mapped Key for assist, which is sent to "All w/ Current," or everyone in your party (assist should technically be "All w/o Current" because you can't assist yourself). If everyone is assisting the tank, then your healer will, presumably, have a hostile target.
My healer's hotkey for alt+; is to /target tank whereas everyone else's hotkey for alt+; is /assist tank. So I target baddie, hit my alt+: and the healer targets me while everyone else /assist Tank.
Hope that helps.