take a look at this powertech/vanguard dps thread on sithwarrior.com
http://sithwarrior.com/forums/Thread-Powertech-Vanguard-DPS-Compendium?page=12
caveats: I've skimmed through it, and I've not dl'd the spreadsheet,
but it appears to argue that using TD (thermal detonator=assault plastique) is higher dps than a hybrid build very similar in nature to the one recommended here..
just wondered what ur thoughts are on the thread.. does it shed any insight..