I have RPR to 90, SAM to 80 and NIN only at 30. Trying to decide which is easier to play and why?

Only done RPR this expansion for a little bit, SAM I played some in ShB. NIN well its unlocked.

Wasn't good at combos or positionals. I heard SAM changed some but also didnt like the look of the armor. Not a deal breaker.

I switched from RPR to RDM as a main and love RDM and its sort of simplicity as to how I understand it. But wanted a melee as well.