Rolling sockets...

Apologies if this is in the wrong place but would like a little feedback. I've searched the forums and whatnot to find that any chest with a itemlevel higher than 50 can roll 6 sockets, it's possible I've just been really unlucky (used 150~ orbs) and not hit 6 sockets. I wonder if it being a Occultist's and it having the extra spell damage that it is limited to 5... just would love clarification that this chest can roll 6.

Thanks