I have been iron 1 since the game released (sucks I know) but I finally made it to iron 2. Do you guys have tips on how to rank faster?

Wouldn't that be pretty cool? for example there is a skin id like to return since i dont like it anymore and buy extra points to get a knife, but i wouldnt buy points from 0 to get that knife, so that would be pretty awesome option :D I th...