Today I finally started getting comfortable with the horrible class that SCH is and it stopped feeling all that horrible. Maybe I just finally had tanks who weren't as tank-y as a piece of wet paper. ANYWAY, I finally got down to mainly dpsing and letting Selene handle the healing. With the first party, that went really well, but with the second one, there was one pull where I saw the tank's HP drop way too rapidly. But dpsing felt way too good and I was positive we could kill the monsters without wiping even if the tank died, so I was like "Good luck, maybe Selene will keep you alive, if not, too bad."
Obviously, the tank ended up dying but as predicted everything went smooth anyway. I apologized how I didn't get out of CS fast enough (even though I never made any effort to actually do that in the first place)...and then the tank apologized saying he wasn't using enough cooldowns. No one was mad at me and one DPS even said how he usually plays healer and how hard that can be, to switch out on time if the tank gets hit without any dmg mitigation.

Suddenly I felt really bad about what I had done xD