Duel field of DNF brushed my stage 2 and 1 stage. Why have no experience?

You must fight with people above 1 to gain experience.

Otherwise, there is only one decisive point.

If it's just to win points, it's enough for you to brush like this at present, 2500 points, requiring 2 paragraphs ~

If you want to upgrade, you have to prepare another number, use trumpet 2 to brush trumpet 1 above 1, then use trumpet 1 to lose your tuba, and then use trumpet 2 to brush trumpet 1 ... and so on.