Speaking as someone who normally heals but started going tank for the daily roulettes, and seriously needs to rant here:
Look, I get it, heal-over-time spells are nice and all. You love them, hey, I love them too! So when I click off your Regen / Medica2 / Aspected Benefic / Aspected Helios outside of battle, it's NOT because I hate you and/or want you to feel bad. It's because I don't want to see every single mob EXCEPT the one I tagged make a beeline for you the instant Regen ticks, before I can start AoE'ing them, and I'm guessing you don't want them chewing on your face either. It gets even more awkward when I'm trying to pull multiple packs, since I'd REALLY rather not turn around to pick up those stragglers who decided you look delicious.
So please, PLEASE, don't cast Regen before the pull, or while the tank is still gathering up mobs. By all means, go nuts with it once the Flashes / Overpowers / Unleashes start flying, but not before that
And if you REALLY want to slack off, just go Scholar, summon your fairy, and autofollow someone.
And yes, I am fully aware that 99% of the people who need to be told this WON'T see this thread.