There are several synonyms for the phrase "strikes deal." One of the most common is "reaches agreement," which implies that both parties have come to a mutually beneficial arrangement. Another phrase that can be used interchangeably is "cuts a deal," which has a slightly more informal tone but still denotes a successful negotiation. "Seals the deal" is another option, which suggests a final agreement has been made and the deal has been officially closed. "Inks a deal" is another synonym that is often used, particularly in the business world, to signify the signing of a contract or agreement. Finally, "concludes a deal" can be used to indicate that a negotiation has successfully come to an end.