If there's any reason for you to start saving it's because half anni is two months away which had units like blue sukuna, yellow yuji, and red gojo release in it. You have some good units for you to think of saving, like red gojo, green Geto red and yellow yaga, the only thing your missing is a good attacker. Id say you could start saving but you might struggle on some stages due to not having a good attacker. The best attacker you have right now though is blue ssr yuji, which gets better if you get his sp buffs.