I see that you have defeated a lot of FG and got electrum to upgrade all the pillars:)
Do you have Shards of gratitude? if you have, upgrade them, and put 4 in deck and quit a feral bond.
Also you have to upgrade both quintaessences, they cost 1 less, and is one card that you will use for sure in a lot of decks.
If you like large rainbows, you can try Seravy Time Rainbow or Pervepic,these to have 50-60 % overall against all goods. People use a lot slim decks, but they don't have the consistency that have a large deck with a lot of drawing power.