The problem with Golgari going wide is it has no answers to mass or targeted removal that hit my equipment (Akroma's Vengeance, Vandalblast), exiles (Swords to Plowshares, Utter End), or targets my key stuff (Cyclonic Rift)
This green, blue, and red deck wants those massive creatures out quickly so theres a healthy mix of ramp, cost reduction for Dragons, and mana rocks to help keep you consistent
In my experience, you dont need to go overkill with your ramp options, though
Before War of the Spark, putting a +1/+1 counter on it whenever you gained life was an option 'may' ability, but was then changed in Spark to be a compulsory ability