Indeed maxing luck is best, 2 luck rings, magic rock candy or lucky lunch, and coffee would be the setup I'd recommend. Make sure it's high luck for your daily luck. Bring bombs, and blast. Go down holes whenever possible, and remember you have all day. You don't need the Obelisk (it's great of course), you just need the warp totem which is just 3 omni geodes. And when it comes to going home, it's entirely fair to reach your goal at 1:30AM and pass out in the mines, it's not a big deal, happens all the time :-)
I'd also recommend bringing 9 stairs, and using them if you encounter an infested floor, or once you're in range to make it there. You only need to use 10 or less to get the "good ending". If you Really need some extra help remember the desert festival chef food stacks with normal food buffs and All of his recipes give +luck, potentially allowing you to hit +10 luck or more for the day if so inclined.
Biggest thing I would say is do *not* fight enemies. Ignore them and focus on blasting and going down, and bring a stack of salads or cheese or whatever to mow down on whenever your health gets low. There are exceptions of course but generally it's always better and more time efficient to just keep blasting and focus on finding the stairs, especially if your luck is high.
Good luck!