I'm working my way around to every color combo, and for GW I went with Saffi. GW is not traditionally one of my favorite color combos, but to make it interesting I went with a creatures and lands only build, with every creature having synergy with entering/leaving the battlefield, to get the most out of saffi.
This is a very interesting take on Saffi. The only creature/land plan forces you to make some tough choices. Maybe some of the creatures in the Saffi Primer can be helpful? For instance Fiend Hunter might be a good fit for more creature control. Or Yavimaya Granger for more ramp?