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Inconel 718 is a nickel-rich superalloy that can function in cryogenic to high-temperature applications. It has excellent mechanical and corrosion-resistant properties. This research focuses on developing Cu and Cu–alloy–tungsten disulfide (WS2) tools developed through a stir casting route, and the machining behaviour of Inconel 718 alloy in the EDM Process is investigated. The influence of output responses of Removal rate of material (RRM), surface roughness (SR), and tool wear loss rate (TWR) on input constraints pulse time-on, peak discharge current, and type of tool. The optimal parameters are studied with the aid of the Response Surface Methodology (RSM) and Analysis of Variance (ANOVA) combination, in response to maximize and decrease the RRM, TWR, and SR, respectively. It is found that using the Cu-WS2 tool provides an optimum finding with a peak discharge current of 18 Amps, and pulse on time of 8 μs yields the best value for RRM, TWR, and SR.