You can gain Contribution Points and rank up by doing the following:

1. Complete NPC Quests (from Vanert or Duprian - depending on your gens class) 

                  - You have to complete the quest where you will receive 4 x 500 Diamonds.

                  - You can do both quest at the same time

                  - You will receive 2,500 Contribution Points for each completed quest.

      2.  Kill other players in the Vulcanus Map from opposite Gens.

                  - For this you will receive Contribution Points for each kill, or you will lose Points when you are killed. 

       3. Arca Battle and Doppelganger competitors also will receive Contribution Points.