You should not have:

An open Sapphire card
Received a welcome bonus on any sapphire card within the last 48 months
Opened 5 cards in the last 24 months

Are you not fully at this stage? Lets see the way around many of these, how can still be eligible and approved

You should have a good score with a own credit card for minimum of a year:

If you have a chase checking account with a nice amount you are have much more chances of being approved even without having a card for a year already