This work advances the quantitative validation of SOLPS-ITER against Tokamak à Configuration Variable (TCV) ohmic L-mode discharges. It shows that the treatment of the ion parallel heat flux limiter and the assumptions adopted for chemical sputtering result in a consistent explanation for the divertor over-cooling and excessive divertor density predicted by earlier simulations. A systematic heat flux limiter scan highlights that a strong restriction of ion heat conduction significantly reduces both electron and ion target temperatures and drives a compensating increase in plasma density , resulting in an overly cold and dense divertor solution. The availability of new and measurements along the outer divertor leg of TCV additionally constrains the model and supports the use of a weakly limited ion heat flux to best reproduce experimental observations. Restricting chemical sputtering to only tiles in the immediate vicinity of the strike points suppressed a spurious low-field-side carbon source associated with thermal molecules and significantly improves agreement with two-dimensional C iii emissivity reconstructions. The resulting SOLPS-ITER setup achieves improved agreement across multiple diagnostics simultaneously for upstream, divertor-leg, and target electron density and temperature profiles, as well as for target heat fluxes and radiation measurements.