So basicly my question is, in which order are stratagems used if both players can use one at the same time.
Example:
My Deathwing has a stratagem that allows them to shoot in the movement phase after they have been set up from teleport strike.
My opponent also has a stratagem, that allows him to shoot at that unit when it is set up after teleport strike.
Obviously it might be critical to determine who shoots first in this scenario.
My take would be, that the player who's turn it is is always allowed to do his stuff first. So in the example above, the deathwing could shoot first.
Another option would be to let everything happen at the same time. However, this does not seem right to me, as the next example shows.
Example:
My Tau Commander may move after it made a shooting attack (for example out of
LOS 
).
My enemy has a stratagem, that allows a unit that dies to shoot one last time.
In this scenario if both abilities are handled at the same time, the move is basicly pointless.
Best Regards
Aeri