I have toyed with flash and if you are rocking worldspine wurm, hornet queen the big persist guy you are doing it right. Natural Order is the best card by far, Oath is only Ok, it has killed a lot of players.
But wtwlf123 is right. I end up with plenty of goodstuff decks. Cards like song of dryads and imprisoned in the moon make solid removal. True Name Nemesis, Kiora, or other 4-5 drop can be a win con when it is ramped into and back by a couple counters and bounce. The deck splashes great with the green fixing and the blue draw smoothing so a couple white or black removal cards often slide in as well.
I love the archetype and I ended up cutting Eureka. Tinker for cards like sphinx of teh steel wind, gearhulks, and and big mana rocks like gilded is great. Natural order into Simic Sky swallower. Green also gives you the ramp to cast the fatties when you don't get the combo. Upheaval also falls into that ramp shell.
But wtwlf123 is right. I end up with plenty of goodstuff decks. Cards like song of dryads and imprisoned in the moon make solid removal. True Name Nemesis, Kiora, or other 4-5 drop can be a win con when it is ramped into and back by a couple counters and bounce. The deck splashes great with the green fixing and the blue draw smoothing so a couple white or black removal cards often slide in as well.