Lets have a look at the aforementioned A 10.31 ASLRBv2. It says IMO that the unit which rolled the "12" is CasRed and broken AFTER any unit Replacement required by ELR failure.
So the ELR Replacement is done first. First the squad is replaced by two broken HS (A 19.13). Since SWs must be assigned to an single owner this must be done when the Replacement takes place.
Then there must be the CasRed result applied. I would use RS to determine which of the HS suffers the CasRed, since it would be not logical to apply the CasRed to each HS individually - (effectively eliminating the entire squad) .
Of course if You tie in the RS both HS are elim.
But gladly we have the Q+A (annual 96 A 10.31).
So the ELR Replacement is done first. First the squad is replaced by two broken HS (A 19.13). Since SWs must be assigned to an single owner this must be done when the Replacement takes place.
Then there must be the CasRed result applied. I would use RS to determine which of the HS suffers the CasRed, since it would be not logical to apply the CasRed to each HS individually - (effectively eliminating the entire squad) .
Of course if You tie in the RS both HS are elim.
But gladly we have the Q+A (annual 96 A 10.31).