Self-care is only "playable" if you have build around it
You can't use alone SF, that would be a killer perk.
You can't use well SF with just one healing perk either, it's too slow still.
I would say Its "playable" (but it still feels slower than before the update despite Botany being buffed) if you run SF with Botany and DM (Felix perk). Then it's okay but if the killer has fast ways to injure you or he has mangled effect it is quite bad.
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Spoiler: Please don't tell anyone that Boon: CoH is a thing! That would ruin the whole build and just trow it intro trash bin.
You also have to build around Power Struggle
Please I have We'll Make It, please it's an 8 second heal, the killer's on the other side of the map, no please don't run into a corner I can see you don't have a medkit please for the love of go
Self Care has always had to be built around to be efficient. Healing 50% slower was never a good option. Not with medkits, Inner Strength, TEAMMATES (ones that never heak you were always very rare for me to run into even in solo queue), eventually CoH to enhance team healing.
It's 2022. Unless you're brand new to the game, you should have moved on to one of the other superior options a while ago. Just my opinion though.
Let me ask, how often do you play solo survivor? Because in my games, people like to break totems, even if they now i have Boon:CoH, which makes it very unreliable.
Unless you refering to swf, where none of that should happen.
Archive is a thing btw.