  We present new precision predictions for semitauonic decays involving $\rho$
and $\omega$ final state mesons. These decay channels offer an interesting
orthogonal probe to study the existing B anomalies in semitauonic transitions
and are accessible with the Belle II experiment. The predictions are based on
combining existing light-cone sum-rule calculations for the form factors with
measured experimental spectra from the BaBar and Belle collaborations. This
allows us to reliably extrapolate the light-lepton form factor predictions to
large values of the four-momentum transfer squared, $q^2$, and in turn to
derive precise predictions for $R_{\rho}$ and $R_{\omega}$, the ratio of the
total decay rates of $B \rightarrow \rho \tau \nu_\tau$ and $B \rightarrow
\omega \tau \nu_\tau$ for $\tau$ final states with respect to light leptons in
the SM. In addition, we investigate the impact of all four-fermi operators on
the semitauonic $q^2$ spectra and these ratios.
