You are asking two questions in one, 1. pulse rating of the IGBT, 2. programming of the Skyper 32 desaturation threshold. Desaturation threshold can be adjusted as described in the datasheet.
SOA can be constructed from dynamic transient impedance curve, unfortunately output characteristic above 400 A isn't specified. A rough calculation of switching and on-state losses reveals, that switching losses are dominant with 10 µs pulse duration. The total power energy and power dissipation at 250 Hz repetition rate can be handled by the device.
The other point is thermal wear and lifetime, addressed by Easy peasy.