If you're doing Isochron Scepter stuff, why not make room for Silence? Also, Immortal Servitude would be a good way to return all your one-drops if they start to die off. Since most of your creatures are humans already, why not add Champion of the Parish? Can give you some bigger board presence and still comes back with Immortal Servitude.
Of course, I don't play much modern, so I don't exactly know what the deck needs. just my first thoughts.
Silence didn't do enough on its own without the scepter or an empty board, I'm still testing with servitude.Champion of the parish is intereting