szescciastek: Thanks, but actually I wasn't able to "click on the painting" with XBOX controller. The YT video clearly shows Geralt facing the painting before it stroke with the sword. On XBOX Geralt was always turned towards Iris that's why I thought there must be some undocumented joystick combination to release the auto enemy tracking.
I managed to beat the ghost by lowering the gameplay skill level. When standing close to the painting Geral accidentally smashed it during combat. It was still difficult but at the lowest skill level the ghost wasn't that strong
Very good way to get around Iris. As long as you returned your difficulty after. I found after being killed a few times that getting in quick and hitting hard done the trick. A few deaths you learn were the Bi*@# will spawn.
How on earth did you deal with the Caretaker? if Iris gave you problems?