Even using those corresponding Jutsus for "Paths" they'd be very limited to how they can be performed... and most of those jtusus would not some odd work, the animal path for instance.
Would you need to buy the animals/summonings?
Would they be determined depending on your reborns?
Would they be able to be exchanged?
Etc.
You would not need to buy the summonings, that's too much work. They just "appear" when you use Animal Path. I guess reborning into it the 1st time, would allow you to summon 1 creature and as you reborn 2nd time, you will notice that 2 creatures come out when you use the "jutsu". The Animal Path did use alot of different creatures. I would say that 1st creature only attacks. When you reborn 2nd time to have 2 creatures out at the same time, the 2nd creature can be that chameleon that "hides" your appearance, making it harder for the opponent to hit you. The 3rd creature can be a creature that grants you atk/def buffs. The 4th creature can be something that just attacks but deals more dmg than the 1st creature.
For the Preta Path, we seen enemies use ninjutsu in a fight and they will give you warning a turn before they actually use the ninjutsu. When you see the warning, you can use Preta Path to nullify the ninjutsu attack for like 3 rounds.
For the Human Path, it will deal dmg while paralyzing the opponent
Deva Path would be a Kaiten-like move because it can stop anything but due to the interval time, it only last for 1 or 2 turns.
Asura Path should be the easiest to do. Just deal a certain amt of dmg and make it possibly to hit multiple enemies.
Hell Path you could make its healing ability only accessible when your hp is the red zone.
I mean I dont think it's odd since if you think about it, everything in Naruto is odd, including reviving the dead o.o
I'm just trying to make it as realistic as possible