You can do max hangs straight after the warm up ...even on rest days (depending on how fucked you're feeling).
I start sliding off the holds
You can do max hangs straight after the warm up before a climbing session, at home before you go out climbing or even on rest days (depending on how fucked you're feeling).
I'm new to strength-specific training tho and there are many slightly different programmes out there...which to choose
8 x 10 second hangs