Been lurking for a couple weeks now, trying to wrap my head around all these cards, miles, and points! First time posting.

My partner and I are trying to quasi-churn for miles for traveling to Europe. Right now we're very flexible and don't have a set time yet, possibly this fall or next spring. I have pretty good credit, last checked it was 778 on Credit Karma.

Currently, the cards I have are:

- Chase Bold Ink Plus (just got this week)
- Amex Blue Cash
- Some random Citi card with poopy cashback

- More random store cards, Macy's, Kohl's, Sears.

I signed up for the Bold Ink Plus because of the 50k bonus and the 5x for office supplies. Now I'm kind of stuck on what other cards to sign up for in order to receive points that would be useful to get to and from Europe (UK, France, Spain, Italy, possibly a few other countries) for airfare and hotel.

I was on the verge of applying for a Citi AA Platinum Select card, until I realized that Chase's Ultimate Rewards does not partner with AA. So this made me realize that I will be somewhat working around what UR offers because I plan on applying for a Chase Sapphire Preferred soon. Speaking of which...

Cards I'm planning on applying for very soon (like in a few days):
- the afforementioned CSP
- Citi HHonors
- Barclay's Arrival

What else should I consider? Can I make the Citi AA Platinum work (they're having a 50k bonus right now, but it won't mean anything if I can't use it). Ideas, suggestions?

And please move this thread if its in the wrong area...