All are good , my suggestion is go with what ever you most enjoy using. If you are looking to do raids and things like that red death is probably the best, as staying alive is very helpful. if you play lots of crucible, the multi tool is very good. But once again it all comes down to what you like. Remember you are going to be looking down that sight, and hearing the same gun shot, for a very long time, so make sure you like the gun first. The multi tool is good for everything, I personally use it everywhere I go.