Does a unit with the skill BS Attack (+1 burst) apply a bonus to their burst in the following scenarios: 1. When declaring BS Attack in the Reactive Turn. 2. When declaring BS Attack while part of a fireteam that already grants them a burst support bonus in the Active Turn. 3. When declaring BS Attack while part of a fireteam that already grants them a burst support bonus in the Reactive Turn. 4. When declaring BS Attack in the Reactive Turn using the suppressive fire state. It seems like the answer to all of these is yes but wanted to get confirmation.
Burst Mods only apply on the Active Turn and do not stack. Fireteams are an exception, as the burst stacks and applies in ARO (screenshot is not complete)
BS Attack (+1 burst) only applies in the Active Turn, see the section on profile MODs ar the start of the Skills section. The Fireteam Burst bonus rule specifically says that it stacks with other Burst MODs.