I actually keep 3 HoTs plus insta and bubbleshield running on my tank via my warden/purifier healer for rifts and 5-mans. I just set a multistep keymap in ISBoxer to step through 'em. Works pretty good so far and the HoTs ticking means if I have to move around, I'm not constantly losing casts.
I also use a click-healing (repeater region) setup for healing other team members.
If you want more details, let me know and I can pull some screenies of the setup.
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