1. Be a long, long time before I'd waste my time on a Discover Card. Discover's roots in the Sears credit card are still showing. No bonus for you!
2. Why not focus on other cards that provide big bonuses?
3. Agree with post above that apporamas are not so useful today.
4. Don't overthink things like app order. Look (say, around FT) for good deal bonus cards and apply as needed.