I'd dump hardline for Ghost and I'd replace Dead Silence with Dexterity. Staying off of the hud and being able to shoot faster and sometimes climb faster are more useful. The only downside to losing DS is that your character will sometimes give your position away. So be sure to pick up a second weapon (also faster with Dexterity) for when you don't have time to reload. Also if you are running the Vector and willing to keep your engagements close then you can dump Toughness in favor of Flak Jacket. If not keep Toughness.