Resto druid not cutting it question mark

Holy priest main, trying to get the 3k io by pugging and ppl don't really like holy/disc atm, I get it, it's not in the best spot.

I kept seeing resto druids in high key premade groups and with everyone and their grandmother ranking them as S, I cave in and decided to build one for myself, to see if it's gonna help with my IO push.

What I am noticing as resto is that if people dodge all the bad stuff and there's no big avoidable damage going out, everyone has their hp full constantly, which is amazing.

Now as resto once one bad misstep goes off into a big aoe dmg event, there's not a big button available to press to bring ppl back up, the ticks are not enough. And I did my homework, I know how to trigger Soul of the forest on demand, keep up wild growth, load everyone with rejuves (usually have at least 8 at all times) etc.

I don't get how ppl think resto is best choice, while as a holy priest, if I have a Apotheosis up, I heal everyone to full in 2 sec, for the entire 30s duration. Holy has BIG MANA PROBLEMS, that's the main thing I went for druid, hoping I can heal without having to worry about mana, it's just not enough, holy feels much more reliable if I have mana, ppl don't die, ever.

Any tips on resto healing through big unexpected aoe events that need fast heals? Because with full Hots up + souls of the forest bloom I'm stuck to casting regrowth, which is not always possible, because of stuff on the ground, I miss one of those regrowths ppl die and it's a wipe.