Why would you waste 4 points on ataru if you don't want to use it?
And about combat logs/damagemeters: -> record a video -> beat a high hp enemy -> respec -> do again -> count numbers / divide Hp/time. There it is, your own, custom built combat log.
I surely would like to see one in the game, too, but it's not like we don't have any means to calculate dps.