How do you feel about Riddle of Lightning? I know it would be at the top of your curve, but in my testing I found scrying 30 and leaving a land on top so my creatures live and then on the zada copy throwing the land to the bottom and putting a powerful 1 cost of top to be an extremely powerful way to dig for what I need.
You can also lead a turn with a Spite of Mogis if you have no instants/sorceries in your graveyard, for a powerful 1 mana, scry 8+ spell.
Another hilarious interaction is throwing Eternal Warrior on Zada, and then targeting her with Seize the Day for an obscene amount of combat steps where you can swing with her, AND it flashes back for cheaper, so it's fine to toss to a loot spell.
Pardon me if I don't see it, but what is the point of reusing Research/Development to get your sideboard cards instead of just putting them into the deck and drawing them when you draw your deck. It seems like another step and like others have said you may not always be able to have a sideboard? So, besides freeing up space in your deck, what is the point of having the combo pieces "Researched" in?
You can also lead a turn with a Spite of Mogis if you have no instants/sorceries in your graveyard, for a powerful 1 mana, scry 8+ spell.
Another hilarious interaction is throwing Eternal Warrior on Zada, and then targeting her with Seize the Day for an obscene amount of combat steps where you can swing with her, AND it flashes back for cheaper, so it's fine to toss to a loot spell.