This is a pretty cool idea, but I also have a cool idea. The idea is to have a bubble on a objective maybe its the spark, maybe its Zone B and you just lure in targets to mow down a shotgun. To maximize the bubble we need long duration a quick cool down. Choosing Bastion and Untouchable will maximize duration and cool down of the Ward of Dawn. Next we need some guns, good guns, like the Monte Carlo so that we can always have are melee and the Immobius so that when we are defending the objective in our bubble we can have infinite ammo. The exotic armor of chose would be No Backup Plans so you can have extra armor in your bubble when getting kills with Immobius. It sounds like an interesting build to me. I have not tested it yet but I will try. Oh yea, I forgot to mention that It's called The Bouncer.

I know its good for the crucible but what about trials. You should make loadouts for trials of osiris (gear and subclass perks).