The kinetic guiding center Fokker-Planck solver LUKE [1] is an ideally suited tool to study fast electron dynamics, including runaway electrons. The electron distribution function evolves in time under the effect of collisions, interaction with microwaves [2], ohmic heating, the synchrotron reaction force [3], and radial transport [4]. Synthetic diagnostics have been developed for both the hard X-ray spectrometer [5] and the Vertical ECE system on TCV [6] for a combined comparison against experimental data. In the context of fast electron studies in TCV, we perform explorative simulations using the ideally suited synthetic diagnostics to characterise the interplay between ECRH and Ohmic heating. By fine-tuning the radial transport operator in LUKE, we match simulation results to the diagnostic data to get an estimation on the radial transport. [1] Decker, J., & Peysson, Y. (2005) [2] Peysson, Y., Decker, J., & Morini, L. (2012). Plasma Physics and Controlled Fusion, 54(4), 045003. [3] Wijkamp, T. A., Perek, A., Decker, J., et al. (2021). Nuclear Fusion, 61(4), 046044. [4] Cazabonne, J., Donnel, P., Coda, S., et al. (2023). Plasma Physics and Controlled Fusion, 65(10), 104001. [5] Peysson, Y., & Decker, J. (2008). Physics of Plasmas, 15(9). [6] Tema Biwole, A., Porte, L., Coda, S., et al. (2023). Review of Scientific Instruments, 94(10).