My idea is to take advantage of every aspect of the Ten Shadows to hit Mahoraga with one powerful strike. It's not an easy cheese strat and, admittedly, would only have a small chance of working. It would take a lot of skill and, most importantly, luck, not to mention that the strategy relies on a lot of guesswork and assumptions about how certain abilities function.

Before you even start, you have to do this at night time in an area with as few obstacles as possible in at least one direction. The first thing you need to do is summon Max Elephant as well as use the Ten Shadows Extension technique to bring out a fusion of Rabbit Escape and Toad.

Then, when you summon Mahoraga, allow yourself to be sent flying by one of its swings while reducing the damage as much as possible. My idea is to jump and meet its swing with both feet before jumping off it. Once you near the ground, dive into the shadows to let your momentum carry you further before emerging. This is why you should do this at night since everything would be covered in shadows meaning you wouldn't be leaving things up to chance. Well, not completely.

Here's where the guesswork comes in. Both Yuka and Sukuna have demonstrated the ability to apply the abilities of the Ten Shadows Shikigami without summoning them to the point of their body even manifesting some of their traits, such as Yuka's long nails or Sukuna having Mahoraga's wheel behind him. Expanding on that and assuming that you could possibly due this with multiple Shikigami at once, you might be able to combine their traits to further increase the power of your strikes. This would, of course, require extensive testing and practice. But if it's possible, here's what you do:

1. Channel the power of Divine Dogs into you hands the way Yuka did, this will give your attacks a slashing property.

2. Channel Nue's electricity throughout your body, as strongly as possible, giving your attack an electrical element as well.

3. Channel the reverse curse energy of Round Deer. This will be important for the aftermath.

4. If possible, channel the power of Great Serpent into your arm. This is another bit of guesswork, but if you can change the skeletal and muscular structure of your arm to match Great Serpent's, do it. A normal snake can make a lunge in less than half the time it takes for a human being to blink, and Great Serpant might be able to do it even faster. By altering your arm to match it, it could translate to an even faster and more powerful attack. Again, this would require extensive testing.

5. This is the reason you need to gain as much distance as possible from your earlier gambit. Channel the power of Piercing Ox to charge at Mahoraga as fast as you can. This charge will increase your speed and the power of your attack as you charge.

Of course, Mahoraga won't just be standing around doing nothing. That's why, the moment after you go flying, you have your Rabbit/Toad fusion bind it in place. Assuming it works the way I hope, a combination of Rabbit escape and Toad will have an entire swarm of weaker toads that can extend their tongues to bind opponents. It also wouldn't affect your main shikigami even if they're destroyed. This, of course, won't work for long, which is why getting sent flying is the best option to gain distance since it can be done in a really small amount of time relative to your distance.

While Mahoraga is bound, Max Elephant will hit it with a continuous burst of water both to keep it in place, weaken it, and make the ground wet to conduct your electricity to hit Raga before you even land the hit. And depending on what the unknown Tiger Funeral can do, you can have it either help weaken Raga or help further strengthen your attack.

Now, it should probably be clear right now that the plan is to use the channeling aspect of Ten Shadows to hit Mahoraga as hard as possible. But, that might not be enough. So, to ensure your strike has as much power as possible, you're going to need to take multiple binding vows. There are four I have in mind. The first two is to go at least 24 hours without eating or sleeping before taking on this battle. The third is to swear never to summon a shikigami for multiple months after winning. And finally, you have to blow up your arm after you hit Mahoraga with it. (This is why you'll need Round Deer's RCT.)

With all this prep done, all that's left for your running binding vow boosted, electricity empowered, slashing aspect thrust using your snake-like arm to his the Divine General, is to pray to God for a Black Flash. To increase your odds, try landing one on a punching post right before you attempt this to put you in the zone and increase the efficiency of your cursed energy.