I personally play diablo 3 and destiny a bit more recently. If any want a monk to roll with on either hit a brother up. Would include eve online but that would require a dna sample and seven interviews.
I still hop on for Destiny from time to time, and we're still only barely 3 in the TEST Squadron clan for PS, and not enough to be official for XBOX. (and none of us regularly play anyway)
Vault of Glass, no. You can, however, do the Nightfall and Weekly solo. I've done it the past few weeks. (of course, you need to be level 28, with a decent set of weapons) but apparently (according to /r/DestinyTheGame) the new 1.0.3 patch increased the difficulty in soloing and reduced the group multiplier, so it's easier with group and a bit harder (more like longer) solo.