This dataset contains sensitivity experiments performed with the ICON model at cloud-resolving scale, focusing on interactions between primary nucleation, secondary ice production (SIP), and mesoscale cloud organization. The simulations represent an Arctic single-layer cold air outbreak stratocumulus deck observed during the M-PACE campaign. Included are simulation data, input files for ICON, and plotting scripts. We find that once established, SIP alone is sufficient to maintain the mixed-phase cloud state until the end of the simulation. Our sensitivity analysis also shows that numerically more efficient treatments of immersion freezing are statistically invariant from simulations with a full prognostic INP budget.