What do you guys do with hordes once the kill-team gets them below 10 magnitude?
So far I've had just had them keep attacking (I've mostly been throwing 'Nids at the kill-team so having the horde rout doesn't make much sense), but that doesn't do much besides slow the kill-team down as without the +1d10 from magnitude hormagaunts are pretty much harmless. I've considered splitting the remains of the horde into individual creatures but that will probably slow down gameplay far too much and it'll still be useless. I could say the rest are dead once the magnitude drops below 10, but that feels a tad anticlimactic.
So what do you do in this situation?