Both of you should be in the safe zone at this point (for sake of this I'm going to add the AU cards and business cards because I'd think Chase can look at all of that when determining bust-out risk). So for these purposes your husband has 4 new accounts in the last 24 months, 4 in the last 12, 2 in the last 6 and 1 in the last 3 (4/24, 4/12, 2/6, 1/3). You have 3 in the last 24, 3 in the last 12, 2 in the last 6 and 1 in the last 3 (3/24, 3/12, 2/6, 1/3).
If I were developing your strategy, I'd have your husband refer you to CIP next. Let's say you do that in April...then come back with your husband in June/July for the CSR (and I'd strongly consider the CSR/CSP double dip but that's for you to decide

). If your combined credit limits with Chase start to get really high I'd consider reducing them a little as well.