I thought the topic was to help food problem in Doom Mode without using much point in SURV stat, so the safest way I can think of that isn't rely much on boring long-grind is: Return to the Inn/ Town. To do that you need to Manage Stamina + Surveying Map (Stealth Stun also helps). Also remember to take multiple quest while traveling
As for fights in Doom Mode? Don't bother as hit and getting hit cost more stamina, just run or bomb them and take their food if they ever drop.