  Recent works have suggested that energy balance spectral energy distribution
(SED) fitting codes may be of limited use for studying high-redshift galaxies
for which the observed ultraviolet and far-infrared emission are offset
(spatially `decoupled'). It has been proposed that such offsets could lead
energy balance codes to miscalculate the overall energetics, preventing them
from recovering such galaxies' true properties. In this work, we test how well
the SED fitting code Magphys can recover the stellar mass, star formation rate
(SFR), specific SFR, dust mass and luminosity by fitting 6,706 synthetic SEDs
generated from four zoom-in simulations of dusty, high-redshift galaxies from
the FIRE project via dust continuum radiative transfer. Comparing our
panchromatic results (using wavelengths 0.4-500$\mu$m, and spanning $1<z<8$)
with fits based on either the starlight ($\lambda_\mathrm{eff} \le 2.2\,\mu$m)
or dust ($\ge 100\,\mu$m) alone, we highlight the power of considering the full
range of multi-wavelength data alongside an energy balance criterion. Overall,
we obtain acceptable fits for 83 per cent of the synthetic SEDs, though the
success rate falls rapidly beyond $z \approx 4$, in part due to the sparser
sampling of the priors at earlier times since SFHs must be physically plausible
(i.e. shorter than the age of the Universe). We use the ground truth from the
simulations to show that when the quality of fit is acceptable, the fidelity of
Magphys estimates is independent of the degree of UV\FIR offset, with
performance very similar to that previously reported for local galaxies.
