NB models of a MW-mass halo host with four sinking satellites in the same orbital plane and in a fully symmetric configuration (see Fig. 2), and with initial speeds corresponding to circular orbits (upper panels). From top to the bottom, satellites simulated as a rigid smoothed Plummer density distribution, as a compact NFW, and as an extended NFW. For comparison purposes, we include the sinking process of a single satellite in all panels (dashed lines). Mass evolution of the four compact and extended satellites in their collective sinking process (bottom panel). The dashed lines show the same process when only one satellite sinks. Satellites start at r = 126 kpc and with v_c = 183 km s⁻¹.