Best strategy is gliding with a rock drake, aggro the whale and get to an asteroid, leave the whale hit the drake, use mek hit on face and let it starve, be sure to hit the whale while gliding or it won't aggro enough to follow you up to the asteroid
If you fall you will be teleported back to the nearest land mass. Just FYI. Used mek and kod 3 each with 1 shot to the head. Highest level 100 lowest level 25. Use hazmat suit to be able to move around in radiation and not burn to death. Bring med brews and stew to counter freezing.