After reaching rank 45, I've spent all resin fragment. I only play daily commissions now. Is there anything I should do?
Other than the usual daily things: mining, comissions, bp missions. You can try to complete abyss 12, complete exploration progress, or maxing out the levels of anemo/geo statues. Hopefully this can help with some ideas: http://genshin.gamea.co/c/lhmwmilp