1.You forgot Fallen Walkers. 2.Shock Grenades (the ones from walkers and drop ships) 3.Melee Captains, specifically the Majors. 4.Flak Cannons The fallen have tools specific for all ranges and the best armor unit in the game, puts the cabal tank to shame. The only thing they don't have is mobile artillery, but if they utilize the shock grenades they will be absolutely nutrageous. Out of all the enemies in the game the Fallen are the most adaptable, the Vex had a real problem with variation. There armor unit was underutilized and was borderline useless because of it's random firing when aggroed. Although they had the best snipers, which as you all have seen where heavily utilized in their raid. The hive had overwhelming melee presence and mobile artillery, but lacked long range fire support like snipers. Although arguably the boomer knights were basically snipers, Hive pretty much have numbers on their side. So do fallen, but more organized. The Cabal I believe to be the second most lethal out of the bunch, but they are really weak to snipers. But have excellent gap closing units, mobile artillary but zero long range capability. If Cabal had snipers, they would easily take the cake, Psions are in a weird spot because it was like they where supposed to do something but didn't at the last minute, I think Psions where supposed to be snipers as well, it makes sense, but then they would just be jackals from Halo. A Cabal Raid would have been really interesting because you could delve into the "psychic" aspect of the cabal psions.