Hi guys, I am new to the game. I have just started playing this game last week, lv40. I only have 11 4,5 star birds (see picture). The only good ones I have are Jacquie and Carson. By the way, are any of these birds worth investing to 80/100+ levels? I have 40 silver tickets on me and another 15 that will expire in 5 days in the mail box. Should just go all in to get to Dr. Probotnik or just let those 15 tickets expire and wait it out till next week? Appreciate your advice in advance.