Best SUB For Cash Back – big spending coming up

Hey guys I’m about to spend a lot of money, let’s say 8k is the budget. What are the best ways to take advantage of SUB between my wife and I? Cash back may be ideal since we can redeem it back against our heavy spend right now. I’m also debating points..

I own: freedom flex, unlimited, preferred, Amex gold, Amex blue everyday, Citi custom cash (900/1500 towards sub), Wells Fargo autograph (sub from a few years back)

She owns: freedom unlimited and I just referred her for the freedom flex which she was approved for.

Thought about getting her the Amex delta gold but the SUB dropped to 50k, thought about sapphire preferred but if there’s anything like the CFU or CFF where it’s $200 back on $500 spend that’s too good to pass up rn.