PLD Novus: Parry or DET?

[SirTaint]

When you say "your job is to do as much damage as possible", one can obviously understand that as "maximise your damage output to do your job properly". Hence "max Det".

He's correct. You should max DET. Whether you care to take the time to do it is up to the player. But you should if you have the means. Spirit bond a set of i70 a day and you Kk have enough det IVs in a couple weeks with another 10 mil from selling other materia.