#1 - If a primaris psyker is attached to a unit of devastators, can you order the unit to Bring it Down? Will the devastators gain tank hunter special rule?
#2 - If a space marine librarian is joined to a 50-man infantry platoon. When rolling the Leadership test for Voice of Command would you use the Librarian's leadership of 10 since it is now highest in the unit? Or do you roll using a sergeant's leadership?
Are there other shenanigans such as this when allying battle brothers with astra militarum?