Well , an idea rings in my head about new FW Tantalus and Crucible. When you measure distance for powers embarked in a transport you measure from its hull , and it have really large hull and probably will go towards enemy anyway. (By the way - is there a 14 AV max anywhere in rulebook? Cause Tantalus can be 15 AV on Ram with Shock Prow).
And distance from big thing like Tantalus is really good, reliable even, 3D6 from each point of hull of such a big vehicle - thats a big radius.
Also you can take TGL for -1 LD upgrade on it.
Against GK if i understand rule correct , IC counts separately for Brotherhood of Psykers rule.
So if Terminator unit with Draigo is subject to CoM both sergeant and draigo have chance to go mad and kill themself.
What do you have in mind for Tantalus? Do you plan to buy it? Do your local gaming comunity approve FW?