Thanks for the answers

As to the PLD and cure thing, it's not so much should PLD slot cure but an example - Essentially what I'm asking is if you're slotting skills from another class is there any benefit to levelling that class further. In my example, this would mean if as a PLD I wanted to slot cure and my CNJ is 15 would Cure on PLD gain anything if say I levelled CNJ to 30 or 50.