you only need real skill if your using masteries.
if your just using the normal skills then you can ring up and it wont matter.
and yes, ive used wraith form and it work, but it seems to work more off of SDI then SS for some strange reason, which isnt how its suppose work, but hey, who am i to complain.
oh wait, sorry, your said the disco masteries.
no i havnt tried them with wraith.
i have tried 25 necro/ss then ringing up to get into wraith then dropping WOD on stuff with spellweaving.
that for some reason uses SDI instead of the SS skill to determine the mana you get back, which isnt how its suppose to work but hey im not complaining.