GNW treasure all the way. Imo theres no point in wasting 210 seals for lol treasure just to get medium tier team with lots of ways to counter it. For now all you can do is make basic teams, so what you currently have will do. If you're lucky youll pull jinpachi and kushimaru and thats pretty much same solid team as Ay team, except you are 200 seals closer to gnw super rare.

Word of advice, since you have 4* gaara. Try to piece jonin minato during events and get his bond skill (kakashi boy is often in random events and obito boy is a random pull in bond treasure), sweep tsunade and kurenai elite instances to get them to 5* and get their books, they are quite strong ninjas. Until you do that, you just need to play with what you get from free draws or what is given away for free in events. And if you get something new, dont hesitate to change your main character.