Fisher forecasted cosmological constraints for a KiDS-like survey, with (cyan) and without (grey) the application of our derived IA priors, assuming intrinsic alignments obey the non-linear alignment (NLA) model. Filled contours correspond to forecasts without any priors upon photo-z bias parameters (cf. the “Modest” and “Informative” prior cases in Table 4). Forecasts with photo-z bias fixed to zero are represented by navy and red unfilled contours, where navy also assumes perfect knowledge of IA model parameters. Dashed grey lines mark values of zero for nuisance parameters.