Lineup Help

I have 300k and don't know what to upgrade, thinking maybe SS2, WR3, or a DT with Inside Stuff. Jordan Howden is my user so the 84 SS is on the field sometimes. I run Gun-Trey and Gun-Bunch Wide from my 49ers offense, and nickel 335 over out of the defense, mostly zone. Lineup- https://www.mut.gg/24/lineup-builder/8149f3cd-54ef-40b0-8635-6bf317218f96/

definitely do the field pass, solo challenges and house rules to get all 3 of the available 88 harvest cards that you can upgrade to a 91, I'd suggest terry mclaurin to help you at WR, or 88 marvin harrison is 53k, alex mack 88 C, and Runyan 88 RT, and gene upshaw 87 LG to shore up the oline. If you haven't already done all the aka challenges to get a free aka card I'd do that also. That should only be about half your coins, I'd really suggest saving as much as you can and only upgrading your team when you feel like you absolutely have to. You can win a lot of games by learning a scheme and having a plan to beat/defend different concepts.