I appreciate the question, but part of the equation is what pick will the Cards have. It’s possible, for example, the Cards end up with pick 7 and Tua is still on the board. There might be an offer the Cards can’t refuse, which could change everything.
The Cards have shown the ability to score even with a mediocre line. So if they want to win next season you’d go defense. I’m not exactly a BPA person; I think if you have essentially equal needs you take the best player at any of those positions. So in this case DL or an edge rusher.
I’d love to grab CeeDee Lamb but unless the Cards can have a great free agency period or somehow trade for an extra early pick, they’ve got to go defense. A second year of blowing leads would likely be too demoralizing for Murray & Company.