<p>Cobalt-based superalloys are categorized as challenging materials to machine because of their poor thermal conductivity. Thus, the machinability characteristics of the alloy and the cutting tool life was largely affected. This creates big challenge for machining co-based alloys in metal cutting industries. The prominent way to get the better results was machining the superalloys under various cutting environments such as cryogenic cooling, nanofluid, and minimum quantity lubrication (MQL). The present work focusses on the machining aspects of Haynes 25 under different cooling conditions. For this purpose, Haynes 25 superalloy was turned under three various environments such as oil with MQL, ionic liquid with MQL, and liquid nitrogen (LN₂). The experiment was designed based upon Taguchi’s L18 orthogonal array by varying the inputs of environment, cutting speed (m/min), and feed rate (mm/rev). The output responses considered for the work are surface roughness (<i>Ra</i>), cutting temperature (<i>T</i>), and flank wear (FW). In order to investigate the best optimizing condition, fine-suited multi-criteria decision-making process called technique for order preference by similarity to ideal solution (TOPSIS) was practiced. The results revealed that better machining performance was achieved at LN₂ environment of 74% improvements in surface roughness, 75% in flank wear, and 83% in cutting temperature. Furthermore, stability of ionic liquid, pH test, chip morphology, energy-dispersive spectroscopy (EDS) mapping, tool wear, and X-ray diffraction investigation were also made and results were discussed. The outcomes state that by employing the LN₂ lubrication method paved way to reduce responses.</p>