Most cards in this category reward you for casting spells with Treasure, like Rain of Riches, Coin of Mastery, and Mastermind Plum
The best way to climb the ranks is to use the best YuGiOh Master Duel decks
But not only that, when its summoned the player can place one Crystal Beast from their hand, deck, or graveyard in their spell/trap zone
Something I suggest making it more OP is to make is to add an effect on at least Mastered UI Goku that says, "If a card is unaffected by card effects, cannot be targeted by card effects, cannot be destroyed by battle, or cannot be destroyed by card effects, it can be." or something along those lines as it completely negates card protection.
While both Tergrid and Tergrid's Lantern are arguably among the most powerful cards in this set, I don't think you gain much by having both on the field at once
Still, there were plenty of instances where disaster could have been avoided, and not every character would always make the right choices