Do you already have the cards with these mics? I know that the 391s are usually sold as a set and then you can add the other caps later.
If the ck93 caps are the only ones you have, try running DIN outdoors with them and see if you like it or not. I have been running DIN and XY with my hypers outside and I really like it a lot. Sure, I wish that I had some cards and omnis to experiment with, but if $$$ is a consideration, try running with the hypers outdoors and see if you need anything else. Those are pretty common mics so you may want to investigate if you can borrow somebody else's card caps for a couple of shows.
The ck98 shotgun caps are really expensive and pretty limited in their application. Save the money on those for a mic upgrade or something. I have never heard the omni caps with the Bluelines so I can't comment on those. The cards sound really nice; if you already have a pair, use those outside. If you don't have a pair, you may want to consider a pair of those before the shotguns or omnis.