My after care is always what my artist would tell me to do. Nobody and I mean NOBODY would tell me the same thing. My first tat will need a few touch ups because I naively listened to a few collegues who told me I wasn't using enough cream.
Everyone's skin has different needs, you just have to listen to your body. If it's too dry, moisten. If it's too wet, wash it off.
It's not rocket science though. You destroy the top layer of skin to put ink underneath and the goal is to keep the ink in place while letting your top layer heal well enough to not obscure the ink.