* If you aren't confident that you can follow the G/S in the prevailing conditions you can do a LOC only approach and factor up the height required.
Tried that a couple of times in the simulator. Doubling all altitudes published for a standard 3° ILS works perfect when flying a both engines-out approach (on A320), and brings you into position for a nice touchdown within the touchdown zone (using more or less the standard approach speeds - with a higher sink rate of course).