[Wardad]

Try searching for SAT and Multi thread.

The bonus to the whole stack for talisman, and combat sensor should work. I tried testing it tactical combat and, it did not work (first) time but then worked later and kept on working.

As far as I can tell the unit being damaged is random. It used to be the first SAT type laid was first hit.
Some people say the weakest one is hit first, just like ship componants. I don't believe this, as it would mean a ships Bridge, Crew Quaters, and Life Support are destroyed before engines.

Unit Shields: Right now (v1.67) units do not have shields, even though they may have a blue shield indicator. The shield points are added to the total damage resistance kt of the unit. I did test and confirm this to see if the Crystaline shield boosting facility would help fighters. Well the facility didn't help the fighters at all but did add 60 to the useless blue shield bar, not 60 per fighter but 60 per fighter group.

Unit damage resistance:
Simply add up the damage resistance of all the unit componants and then add in the shield points.
The WP larger mounts also beef up direct fire weapons damage resistance and can be a better deal than armor.

Unit Armor: "Armor is hit first" makes no difference to units. Armor points (actually damage resistance) is part of units total damage resistance kt. Unit componants are not damaged and unit performance is all or nothing. Unit damage is kept track of and totalled until it is high enough to kill the unit. Do not expect emissive armor to work on units, even if it gets fixed for ships in the next patch.

Only X or special weapons, (ex. Computer Virus, Ionic dispersers, etc) do not do special damage but will do normal damage, within reason. Obviously boarding parties and Alliegance subverters have no effect.