Thanks for posting.
Grenzo, Dungeon Warden is so cool as a general, because you can build him out in many different directions. Conspicious Snoop is a nice possible include, but so far I haven't pay tested him yet. The main thing I don't like about Snoop, is that my version is mainly built to play instant speed on an opponent's turn. I'm also not to hot on
Goblin Recruiter for this deck. However, this being a goblin oriented,
Mana Echoes version, I may change my mind. Currently I am testing
Necrotic Ooze as a possible include, which I haven't played yet. A card from Zendikar Rising that WILL be going into the deck is
Valakut Awakening!