Hey guys, I'm a long time lurker, first time poster.

Was wondering though, for all those guys who've accumulated millions of miles, what I should do next...?

I've accumulated almost 800,000 miles over the past few years, starting with the citi aadvantage 2 browser trick for 150,000 miles, but got really serious about it 6 months ago. In the past 6 months, I've applied for about 12 cards for over half a million miles. I've redeemed for multiple business class trips to asia and the caribbean, but I feel like I've reached the point where I can't find anymore new cards to apply for. I currently have:

Chase Sapphire Preferred 40,000
Chase Ink Plus 50,000
Citi Aadvantage personal 50,000
Citi Aadvantage business 50,000
Chase United Explorer Mileageplus 30,000
Barclay US Airways Mastercard 40,000
Gold Delta SkyMiles Credit Card from American Express 30,000
American Express Open Business Gold 75000
Starwood American Express SPG 30000
Barclays Frontier Airlines 40,000
Bank of America Virgin Atlantic Credit Card 50,000
Bank of America Alaska Airlines 30,000
Citi® Hilton HHonors Visa Signature Card 50,000

I was denied for US Bank Club Carlson and Barclay Lufthansa.

What new cards can I even apply for to get more points? I'm mainly focused on business class redemptions to Asia, so cards for primarily domestic travel like the Chase southwest card are out. And I'm not that interested in hotel credit cards at the moment.

I'm planning to get the Chase Ink Bold for another 50,000. After that, I feel like the only cards I can apply for are the ones I already own, and it seems like these cards are getting harder and harder to churn. What are all you million mile holders doing to get more points that I don't know about? I was planning to churn the citi aadvantage business card, but I heard that people are getting denied now if they've had the card within a year.