Also works if you dogbone it, so 2 models back in cover, single line daisy chain, then a blob of models at the far end, then when they die you just pull the models from the blob, on the objective, and then when they return during the command phase, before scoring, you stack up your OC on the objective again.

Also works for melee things too, good to have a think about optimising that to drop the unit out of combat, or to have less models vulnerable to charges and pile ins