Save as eps in level 3 and raster it then. This must be done at the very beginning, while exporting to eps.
Disable preview for the eps, theoretically this also might help. Get more free memory (close Illustrator, unload all unnecessary things, load Illustrator) and save the eps.
If nothing works and you are really confused and don’t know what to do – use a third-party then. The good one might help you in the matter. Recovery Toolbox for Illustrator, for example https://illustrator.recoverytoolbox.com/
And the last – Ctrl+A > Ctrl+C > Ctrl+Tab (Photoshop) > Ctrl+N > Ctrl+V > Enter > Ctrl+Shift+S (TIFF). 100dpi should be enough for you if it’s a large format printing.