I too have 85L, 50L and 70-200 II, well as the 135L. Based on the OP question, I agree with others in saying the 70-200 II. It is a fantastic lens. It would likely be your most used based on the information provided. As another said, the 24-105 will do in a pinch.
That said, I love the 85L. It is not one I use a great deal, but it is unique, in a good way. Not fast focus lens, but great quality. My next is likely the 24-70L to replace the 25-105 for me.
All the best...