Genshin Helper Team's crowdsourced list shows that the drop rate of Billets and Dream Solvent is fixed at 0.12% and 0.33%, respectively. Meanwhile, on average, you can get two weekly talent level-up materials per Trounce Blossom in a single run. When it comes to artifacts, you can get one 5-star artifact every run. Lastly, gemstones have a drop rate of 0.32% at AR 55 and above.