I just used 2 12V strips in series, so got the current down to half, and this was only because I was going cheap, using an old 24V power supply that was lying around unused, and also recycling old LED strips I gutted out from the scrap yard from scrapped display fridges. Did not need anything more.
I would just run 2 in series, the light output will be lower, but the led's will be more efficient at lower current, so not half the brightness, probably 40% less, and as a bonus they will last a lot longer and run cooler.