Though i really like these ideas, i have to correct you on this one. You see, all non-public areas will have the same level enemies as the mission you started. This is an old trick for completing the Pocket Infinity Bounty, you need to make kills during nightfall, if soloing it with a fusion is too hard for you, you can just start it, and go to an opposite direction and find an easier non-public area to make your kills. They will be the same level and the modifiers like burns will be active.