u/Brazen-Frontier

I currently have the Savor, Quicksilver, and Venture X. All cards are paid off in full every month, no other debt (aside from an auto loan). At the moment, the QS is sock-drawered (one small charge per month), so I only use the Savor/VX duo to maximize miles/cashback. If I wanted to add an additional card (inside or outside the C1 network) to gain revolving account diversity, what would you recommend? Shooting for 4-5 credit cards total in my rotation, but plan to keep Savor/VX as my main workhorse. Bonus points if there are any solid SUB cards you'd recommend (even if the card eventually gets churned/sock-drawered).

Credit score is 751, total credit length is ~2 years (all with C1).