I have some questions about tanking Kamila's first form.
If someone brings cl12 Iron Will, is having Fitness by itself enough willpower to not get slept?
No. You'd need fitness+integ or fitness+sugar rush to keep from getting slept. Getting slept isn't a big deal in first form as long as there's some other people with wish in crew that rage it.
How long should I let Kamila attack before it's ok for everyone else to start attacking?
And should knife be used at all while I'm trying to get aggro? If so, when and what rage rank?
I dunno? A minute? Knife can help you not getting hit but you really probably don't need it. It can help on the last screen because she hits harder there, though. R4 knife at least lets you focus more on healing everyone else instead of yourself.
Although to be honest I prefer just to mob Kamila on those screens. With r4 adren and everyone attacking and everyone but the healers r4ing hack you should make her flee to the next screen in under a minute.
About when should the back up healer jump in? With Wish or Bandage? Should they rage their heals at all? (Probably with no Sweetheart)
Go with whatever works for you. r2-r3 wish should be enough to heal everyone. For the tank I'd say under 1200.
And on the first screen (where you walk in from the HPR) isn't it possible to ninja the top coffin by Kamila? But the one on the top left has to still be alive? I think that's what I heard.
You can ninja the top right coffin if you hug the left rail by the stairs and use the "G" to target button on it.
Oh, also is it worth it to bring any kind of crowd control? Either as the tank or anyone else in the crew?
I personally don't use any crowd control for First Form but I could see cat being helpful if you need something.