Magpie wrote:Sorry what does that mean ?
The 'psykers' in the henchman unit are sadly named 'psyker' which is also the term used to describe all psychic individuals in
40k ('psyker').
Ergo, it is impossible to write rules for henchmen psykers without also writing rules that apply to every single psyker.
The only way the henchmen psyker rules make any kind of logical sense is if they are written under the presumption that they are referring only to henchmen psykers, as opposed to all psykers in general.
As to why they just didn't name them 'Hechmen Psykers' or 'Sanctioned Pyskers' or anything besides just 'Psyker' I will never understand.
If you want to try to play it '
RAW' (as best you could), then yes, any other psyker model joining the unit could be used to draw line of sight from for Psychic Barrage. But since all psykers in the unit count as a single psyker that would also mean the use of a psychic barrage would count as the joined psyker having used a power.
Really, its all hogwash that makes no sense if you try to read it that way.
Just read the rule as applying only to henchmen psykers and your life will be much easier.