yep - the suck thing about getting VT key is - See you later Sanctius Seru as a Tradeskill haven. Best place to tradeskill in game - if you don't need planer tradeskilling forges.
These drop off any mobs in the big circle tower just port up near DSP zone out and start killing I have been here a few times helping guildies with keys mobs are fairly easy for anyone who is going for the key most green with a few light blues and 1 dark blue who if he catches ya off guard can actually mess things up he is a barb I forget name but he summons. On avg you get 1 shard maybe 2 on a full circle around tower sounds easy but the circle is pretty dang big heh.
P.S. any help on some of the other shard drops would be nice if you can add any info to em