Massaen beat me to it.
The dais must begin play carrying 9 models in addition to vect. The dais counts as a raider with av13 and 3 dark lances, but is a raider in all other respects as per the codex p55. That means it can only carry 10 models, and grots are bulky taking up two spaces each in a transport. So no grot bodygaurd for vect!
Now on a Tantalus......
“If an injury is to be done to an enemy, it should be so severe that his vengeance need not be feared”
- Archon Niccolò Machiavelli