Adjusted food and utilities would also make good sinks. Base items does +x, add more mats now it does +y, add more mats its does +z. They don't even need to be high amounts. Examples of types of these are like the LS3 recipes. There are variants out there that have the same main stats but by adding extra mats (Winterberry Pie vs Omnomberry Pie) you can craft a version that also does additional boost.