I have seen some pro players do this, if you do everything perfectly, you will have your midas at 6 minutes(my best timing is 6:22). This guide is for Doom players who strictly wish to farm a fast midas(while not contributing to ganks early) within 6 minutes of the game. (at most)

Once you start off jungling,

1. First step is to stack the large camp. At 53 seconds, cast devour on the biggest creep.

2. After stacking, proceed to the small camp and kill it. At 53 seconds, stack the large camp again. (at 52 seconds, 51 and so on)

3. Keep stacking the large camp until you find the Wildkin creep, with 4-5 stacks of the large camp you will have enough gold for your midas once you eat the Wildkin and cast Tornado on the stack.

(Warning, if there is no Wildkin in your jungle, you are screwed, tell one of your team mates check the other team's jungle for the Wildkin creep. If you stack the large camp for the 3rd time and dont see a wildkin, you have to go for plan B. i.e Find a lane and farm or smoke up and go to enemy jungle and find a WIldkin. From my experience, out of all the doom games i have played there were only 2 games I couldnt find a Wilkdkin while jungling, both games i ended up losing because i was underfarmed)

With midas + devour(maxed out) I have farmed drums in less than 5 minutes. Good luck!