Credit to @madmarv for this writeup.
Source: 
Early Information on Ninja Tower Event [Part of The Beta Beat v31 & V32]
Not mine. Guv posted this at the top of the discussion about Ninja Tower thread.
Logic makes sense. I’m going mana gen whenever that is an option, and attack when it isn’t. Idea being kill the enemies faster so I run less risk of being cursed or dying due to poison etc.