Rather than write more about PvP addons, I made a video showing how I like to set up for healing.
This is using (not quite) minimal addons to get all of the options that I want available. When I have the time, I’ll add comments / notes to the video on Youtube with the time links for each addon, so for now you can probably watch it at 4x the speed and just pause when you get to the configs you’re looking for!
Here are my Minion addons list (as of 2020/Q4). Note that not all of these are active in PvP!