Counter and control is hard to come by in G/W. The one card that comes to mind for me is
Mana Tithe, and that's really about it.
Silence could be another option worth considering, though it doesn't
serve well as actual counterspelling.
The primary reason I was quick to remove the buffs was their singleton nature. Boardwipes are always going to be hard to get around, and the absolute best you can do about them is either counter them or get back up and try again. Elspeth is an invaluable asset to any high-dollar token scheme (Currently just over $17 apiece, but wait until February with the
release of her in a Duel Deck, and she'll go down), and rightly so. If you can get your hands on one or two, I highly recommend her. She's great because she absolutely pumps out tokens, gives your tokens a massive buff with her ultimate, and can help clear the board a bit.
That said, general buffs like the +1/+1 counters from the
Bow of Nylea or even potentially adding a
Spear of Heliod for the permanent buff are your best bet against
Drown in Sorrow and Festergloom-esque problems.
The nine one-drops
serve your strategy well, as several (i.e. the
Elvish Mystic) can
serve as mana on their own, and all help out your convoke theme. That, and they give you several wonderful options in the early turns of the game, being either blockers, attackers, or more fuel for your ramp.