Top panel: DF efficiency map for the FDM-DF-only model with halo-to-GC mass ratios between 10³ and 10⁵, and FDM particle masses m₂₂ ranging from 0.1 to 100. The secondary axis shows the corresponding halo mass assuming M_GC = 10⁶ M_⊙. The map is computed on a 16 × 16 grid, where each point corresponds to a NFW halo of a given mass and a DF force derived for a specific FDM particle mass. For each combination of halo-to-GC mass ratio and FDM particle mass, the DF efficiency is evaluated using 1000 orbits in order to limit computational cost. There were uniformly distributed in logarithmic space between 0.1 and 10 r_s. The orange dashed and green solid lines indicate the 5% efficiency frontier for CDM and FDM-DF-only models, respectively. Bottom panels: Orbital radius normalized to its initial value as a function of time, for GCs integrated over 10 Gyr in a 10⁹ M_⊙ NFW halo with classical DF (orange curves) and FDM DF (green curves) for m₂₂ = 0.16, 4, and 63. For each case, both radial and circular orbits are shown. Dashed white lines separate the three regimes of FDM DF: (1) absence of friction inducing orbital stalling, (2) reduced friction, and (3) the classical regime.