My suggestion is stop applying before your current cards balance chase you and close your accounts. Your lucky to have the cards such as Discover with a BK on your credit file. Hopefully if they review your account they don't close it with all your HPs showing. In my opinion you must wait at least a year preferably longer before applying for new credit. Credit is a journey not a race.
Discover IT $17k / US Bank Ace (VSig) $13.5K / US Bank Cash+ (VSig) $13.5kI agree with the others. Your line-up is not bad, and you were approved for a Discover card with a very good starting CL. I see you've had your Kohl's charge for over two years, and the CL is still low. Last July, Kohl's made it much easier to request a CLI. Just go to your online account, and you'll see the "request an increase" or something similar to that. It's a soft pull, and if your account is in good standing and you haven't had an increase in the last four months, I think you'll see something happen. There is no need to call Customer Service anymore when you can do it online and find out the results immediately. I would just sit tight for six months or so and enjoy the cards that you already have. 
With the BK, it's best to forget about Chase, Amex, and B of A for a couple more years. I don't see any problem with you combining your two Cap One cards if the option is available. One of the cards needs to have a zero balance, but since they are both close in age, close the one with the highest APR if possible. If you truly want one more card, with a higher CL, then Cap One Venture Sig might be a possibility. Like you said, Cap One has been good to you. Closing First Premier and Credit One would be top on my list. Other than that, I would definitely go to the garden and take a long siesta.
