I think we were discussing night IFR according to the OP. For me the loss of the only engine takes you to one option, you are going to land, very soon. So for me I would be out of options except where to land. Therefore I would need more training.
Your example is 8K feet. In fact go to 8500 feet sometime with a safety pilot while you are under the hood in VFR. Pull the power and don't take off the hood until you are at 2000 AGL (which would not even be IFR). See how that works out. Now do the same exercise in a light twin pulling just one of the engines. You say you have never tried it but it would not be a problem, well try it. Just stating the obvious to me, in that there is increased risk.
Your example is 8K feet. In fact go to 8500 feet sometime with a safety pilot while you are under the hood in VFR. Pull the power and don't take off the hood until you are at 2000 AGL (which would not even be IFR). See how that works out. Now do the same exercise in a light twin pulling just one of the engines. You say you have never tried it but it would not be a problem, well try it. Just stating the obvious to me, in that there is increased risk.