Left panels: figures of merit as a function of the number of free parameters as a function of wave vector N_K in the bias terms For each line type, the upper curve is obtained for a number of free bias parameters as a function of redshift N_Z = 2, the lower is for N_Z = 4. Right panels: same as on the left, but as a function of N_Z, i.e. the number of redshift parameters in the bias terms. The upper curves for each set correspond now to N_K = 2 and the lower ones to N_K = 4, respectively. Upper panels: figure of merit taking into account the full cosmological parameter space, FoM_TOT, see (45). Lower panels: dark energy figure of merit from the Dark Energy Task Force FoM_DETF, see (44). Dashed curves correspond to results using galaxy ellipticity correlations (ϵϵ) only, dotted black curves to galaxy number density correlations (nn) only, and solid black curves to results using all correlations (ϵϵ, nn and ϵn). The grey dotted lines show results for nn correlations without imposing cuts in angular frequency. The constant grey line marks the FoM computed for the pure lensing, i.e. GG, signal, assuming intrinsic alignments do not exist. In addition we show the resulting figures of merit when using our most flexible parametrisation with N_K = N_Z = 7 as filled symbols. Circles correspond to ϵϵ, triangles to nn, and diamonds to all correlations.