We know that there are 2 ways to get your bankai, either you:
-get it through time and regular training (we don't know a lot about it tbh)
-Or you do the training Ichigo did
The main tradeoff between those 2 is time, the ichigo training should help you get it much faster but it also has a lot more risks.
For the long method, you would have to fight your bankai, but he would only have 0.7x your stats (still enough of a challenge)
And for the quick method, you should have to fight your bankai which would have 1.3x your own stats(using an item that could be costly to craft (nether star or smth)) but if you lost against it, you would lose stats and maybe you could have a cooldown on trying to get it (maybe the item could get destroyed in the process too).
We know that there are 2 ways to get your bankai, either you: -get it through time and regular training (we don't know a lot about it tbh) -Or you do the training Ichigo did
The main tradeoff between those 2 is time, the ichigo training should help you get it much faster but it also has a lot more risks.
For the long method, you would have to fight your bankai, but he would only have 0.7x your stats (still enough of a challenge)
And for the quick method, you should have to fight your bankai which would have 1.3x your own stats(using an item that could be costly to craft (nether star or smth)) but if you lost against it, you would lose stats and maybe you could have a cooldown on trying to get it (maybe the item could get destroyed in the process too).