So at the moment Golgari isn't the best plan of attack given that it lacks the scry land in both colors for the fixing. But that being said, I think there is a niche there to take advantage of the lack of graveyard hate these days. Yet, your build might perform well in a casual setting (and certainly has the counts to be consistent); however, it is't using any of the ideal cards for the colors. In particular, here's a list I've been refining for the past few weeks to try and make something competitive http://deckbox.org/sets/464290.
Things you'll note in my build are the improved quality of the four-drops. Whereas you're sitting on Corpsejack Menace, Golgari Decoy, and Korozda Monitor, I have Desecration Demon, Jarad, Golgari Lich Lord, Polukranos, World Eater, and Reaper of the Wilds. You can think of the four drop as being the most critical to the plan.
You also would benefit from some more focused removal. Doom Blade is good, unless you run up against any black deck. Abrupt Decay, Putrefy, and things of that sort are typically better options.
I would also suggest going to your local FNM to scout out to see how competitive the environment is. If it's a super hardcore FNM with a lot of tier 1 decks, you'll want to totally overhaul this thing. If it's a bit more open with a variety of homebrews, well, odds are you will have more fun and it will take less work to make the deck effective.
Anyway, take a gander at the build I proposed and feel free to incorporate whatever components of it you like.