The not so fun fact for this mission is that, as cool as reapers are in concept and design, there's only 3 missions in this campaign they are very good at. One is the mission you unlock them on. The other two are the first two Hansen missions (the Escort one and the clear the infected by day one). Moebius Factor would also be a great one for them if not for the side objectives. If you use them to save the stranded units, you can't take those units with you on your way, and they can't reach the little island in the middle with the Brutalisk.