If i can't get a leash for whatever reason maybe we got invaded and wipsed and they want to get to lane there aren't many champions that cant get away with the following clear by themselves:
golems/krugs(smite) to get to level 2 (drop ward at your red to make sure enemy doesnt steal) > raptors > opposite side scuttle (should be fast with the stun buff) > blue buff (gets level 3) > gromp > wolves.
This nets you about 800 gold and if you just want 600 gold or so for a machete/talisman and hunter's potion and you're worried about health you can stop after blue where you should have around 600 g.
Be sure to immediately go krugs then red again as you want to get tht timer up and running and make sure it isn't stolen as your ward should expire around when your finishing blue and are at gromp.
Theres no champion that I think its worth to back at 250g for just hunter's potion, I could understand at 350g for your other jungle piece though. I havn't played any champions in the jungle that can't perform this clear.