Collision outcomes and deposited orbital energy for the interaction between a 1000 M_⊙ EMS and a 70 M_⊙ companion across initial orbital configurations. The EMS structural profile after the relaxation steps is used for trajectory integration. The initial semilatus rectum ranges from 10 to 10⁵ R_⊙ and the eccentricity from 0 to 2. The EMS radius is indicated by the dashed gray line. Left plot: Classification of collision outcomes (A–D; see Sect. 4.3) as a function of the initial semilatus rectum and eccentricity. Right plot: Deposited orbital energy for mergers and scatterings in the absence of external interactions.