wtnind wrote:That's great thanks, so regardless of any tau trickery, all targets for all models in the unit have to be declared before resolving any of them.
Exactly. Unless a unit/weapon has a special rule that
explicitly says you can wait to see the results before declaring your other shots you are required to declare them all simultaneously even if they have different targets. So you can't shoot at a vehicle and then shoot the passengers because the passengers are not a legal target at the time the unit's targets are declared.
1)
Networked markerlights are always resolved first, before any other shooting. So, for example, you can fire the markerlight and wait to see if you get a hit to improve your
BS before committing to using your one-shot seeker missiles. Or you could wait to see which markerlights hit before using target locks to split your fire based on the number of markerlight tokens on each unit (for example, not splitting fire if you feel your
BS will be too low and you need to focus everything on one target). However, since a markerlight can never destroy a transport that still doesn't let you do what the
OP asks about and kill a transport then shoot the passengers.
2) The split fire rule has you shoot with the splitting model, resolve everything, and then shoot the rest of the unit at a different target. However, the errata for this explicitly bans you from picking a just-disembarked unit for the second target. So you can still wait to see which target you want to shoot at based on how well your first shot did, but you can't do what the
OP asks.