The ''experience'' wasn't a problem. Said Kruger would have probably killed anyone of your GB-s in solo combat, but not in group fight with 2 more bombers snacking every few seconds. Also, there weren't any npcs around. The Kruger pilot fought till the last possible moment though it would be unfair to let overwhelming force take all the ''glory''. As for his presence in Omega-11, he wasn't even looking for Hessians but was wasting time next to Daumann miners mining in the field and shooting some npcs.