I also often use capacitance to roughly locate an open in a cable that has quirks and interconnections that will give confusing results on a TDR plot. Simply identifying which end of a cable has an open pin on a moulded connector is often all that is required, in which case the bad end will have near zero stray capacitance and the actual reading at the other end doesn't matter. In reality I probably use my capacitance meter more for that kind of thing than measuring capacitors. Capacitance measurement works well on T+E, but the results will vary according to how the CPC is connected and to a lesser extent how it is bundled or in contact with earthed stuff. Probably best to measure between one or both live cores and the CPC.
I had to create a Heath-Robinson TDR setup in the middle of nowhere, when I had access to a computer and a monitor but no test gear. A TDR set sends out pulses and times the delay before reflections are received that indicate open- and short-circuits by their abrupt changes in characteristic impedance. I used the computer and monitor to do the same thing. I stripped a section in the middle of the monitor's RGB cable, broke into the green channel and paralleled a pair of very short test leads. By displaying a clear vertical bar on the computer and measuring the distance on-screen between the true image and the ghost with the test leads connected to each end in turn, I could calculate what fraction of the length lay between each end and the fault (It was exactly 100m if my memory is correct. The cable was defective in manufacture and there was a feeding-in splice in the core that should never have been present in the finished product)