I'd like to be honest... I figured builds to be evident from previous info from the Out Here in the Wild Vidoc and the loot system. The mention of builds therefore sounded like old news to me. I even made the same sort of thing you have here after E3! A problem with your first build is that a shotgun is most likely a secondary weapon. Using an assault rifle for your primary will most likely be your best tactical decision due to full auto capability that can tear through incoming Hive quickly. You'll definitely want to save that SGA for Phogoth when you reach him to inflict high damage safely, unless you have ample fireteam support distracting him. Build 2 seems similarly mistaken regarding weapon classification, except this time your pulse rifle (that's the 3-rounder you are talking about) will be your primary. Hopefully, this allows your fusion rifle to be secondary, as it will definitely make for good suppressing fire. I would expect to see Titan's with rocket launchers for medium range engagements as well... especially if they don't have the ranged firepower of a Warlock supporting them. Let's hope we get to see more Titan abilities before the beta arrives. It's great that Destiny allows for so many possibilities for combat preparation compared to what Halo would do.