Questions about collatarial damage.

[muxec]

How does it work? What promotions should be used on artillery planed for killing enemy SoD? What about bombers?

 

[VoiceOfUnreason]

How does it work? What promotions should be used on artillery planed for killing enemy SoD? What about bombers?

The Collateral Thread of Doom

Almost all of your answers are there, somewhere. Note that the first half of the thread describes the game prior to the 3.17 patch, which changed the way the promotions worked (that's at post #194 in the thread).