I dunno...I found that having a shotgun and DMR/Needle Rifle allows me to do that whole demonic blur of dropping enemies pretty effectively. What I've found is that Halo 1 requires you to play smart period, where as Halo 2-Reach reward aggressive gameplay behaviour on any difficulty save Legendary. Even on Legendary, if you try and wait it out you will die in some stupid, trivial fashion where if you suck it up and bumrush at the right time, you'll come out victorious.