Disclaimer: The rules do not back this up with concrete evidence as far as i can find. But that's the nature of holomask; janky-as-fuck! With Holomask, the profile you are impersonating is the information you would give someone. eg: Your holomask is impersonating a profile with mim-6. Up until something actually shoots the holomask mini, it's going to look as if it has that mim-6, but once skills have been declared and steps of execution moved through that will no longer be the case. Same would be for fireteam composition. If the profile that the holomask unit is copying does (or does not) have the keyword for the fireteam that it is in, then at that point the bonuses would be deduced. Again, the fireteam bonus would then be ratified during the rundown of skill execution. tl;dr: Holo is meant for mind games. If a unit looks like it does (or does not) have a skill or ability, then that is the case until the holomask is revealed. The arguments for each side hinge (as is often the case) on thematic & expected behaviour vs rules as written & found.