Without Brainstorm, I find that when running Gushbond there are many games where I do not have Fastbond and end up with a lot of lands in my hand. Ponder and Preordain do not really fix this. They help you drawer fewer lands in the future, but they do not get rid of lands in your hand.
From there I tried a few ideas. Careful Study I did not like because it was card disadvantage. Gushing into Careful Study led to no card advantage even if it was decent for filtering.
Cephalid Coliseum has similar issues and does not play well with Gush.
Three possible solutions are Raven's Crime, Jace The Mindsculptor and Nostalgic Dreams

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Jace and Gush interact well in general. Jace shuffles back extra lands. Gush helps you hit your 3rd land drop for a turn 3 Jace.
The problem is neither is good against Resistor effects so a deck that leans hard on both tends to lose hard to Mud.
Another option is Raven's Crime. I am not sure it is worth running though. Basically I would never tutor it up since I would rather have Fastbond. They are not great in multiples. Still, it is nice to be able to turn excess lands into bad Duresses against other control decks.
A final option is Nostalgic Dreams. In general this is dangerous because if it is countered you still discarded the extra cards, but discarding lands vs Control is not the end of the world and against decks without counters this is not an issue.
Also

is a pain to get out. When it resolves Dreams is nearly like a Yawg Will. With Fastbond you can do silly stuff like Gush and Dreams discarding 3 lands for 2xGush + Recall and draw more cards with more mana.
In practice it is not so good. It is slow against Dredge pre board. It gets coutered against Control decks and it is tough to get

against Mud. The flexibility does allow you to discard uncastable cards to get exta mana sources vs Mud. For instance you might actually discard a Gush to get lands. Because Nostalgic Dreams is not unique to lands you can potentially discard a Tinker or Oath target.
I know Jace is played with Gush usually with only 0-2 copies. I have not seen Raven's Crime or Nostalgic Dreams played. Are they potentially viable even as just a one of? Has anyone else tested them? What did you find?