I would disagree, I have a maxed armamentarium in the vault since I realized the value of Saint 14. An extra grenade is great, but blind enemies = longer life. For PVP, armamentarium is most likely better but that's not where I spend my time. The team value in PVE is really fun, I love the melee pit that ensues once my teammates see the enemy blindly wandering through my strategically placed bubble.