How should Faustus be played in 2.3...

Arguably, Faustus should be played as a fearful character, as it appears he immediately changes his disposition to avoid angering Lucifer after being entertained by the seven deadly sins, 'O, this feeds my soul.' However Lucifer does not believe his response, 'Tut, Faustus,' this suggests that Faustus should be played as nervous, not his usual confident and arrogant self. 'Farewell, great Lucifer,' despite usually mocking the idea that anyone is greater than himself, Faustus seems obsequious, defying his previous attitude. Overall I think that Faustus should be played as servile, but obviously dishonest and nervous.