Arum, if you are very interested in participating in war, I would highly recommend doing some serious grinding over the next few days. If you can boost your card base and your score, you should have a shot at being a support team member. If you make a support team, you will need to continue to grind because you need to be able to make almost any deck your team asks of you. There are threads with recommendations on what the most efficient way to grind is. You can also join chat and ask people what they think.