Ok so I found a few spots glitches were enemies can't harm you. The first one was in the first mission when you make it to the re spawn restriction area you can hide at entrance and the fallen will come up to you but then back off. I suggest that bungie makes it to where the fallen should be able to rush you anywhere this will make for a pretty intense experience also just a side note while doing missions on hard lets add more elites in a lot more spots in game. Also if we could make the enemies smarter after killing 5 waves of them that would put more entertainment. Next a big glitch I found while fighting the devil spider tank in the mission devils pass, is that if you jump on top of the roof on the building across from the tank; the tank can't hurt you! The explosive shells hit the side of building so most players can just sit back and constantly shot the tanks legs without worry of death. This makes this boss battle way to easy, if we can remove this building or have the spider tank aim a bit higher this will solve the problem. Also we can always add enemy units to spawn closer to this building more frequently to have players have to fight and defend. Ok last spot I found was actually at last boss battle in devils pass with the orb guy (sry can't spell his name) if you go to the side with all the boxes you can actually stay out of the orbs attacks and the fallen and drones ignore you. Also this is where all the cover is so taking a brief moment to duck behind the boxes and you heal. This makes this boss way to easy. If bungie could take out a few of this cover spots and add more intelligence to both fallen and orb this could be a more fascinating fight. Also giving the orb boss a shield when fallen show up might extend the battle a bit more for a true first battle. All in all love this game n have high hopes that bungie uses all data from alpha and beta to make enemies more adaptive to players. Increasing AI will only make this game better. Also I know there are a lot of other glitched spots in beta but can't name all of them these were big ones that bugged me, if you have more please add here or make new post so bungie can improve game.