Yes there has been a lot of CS2 discussings for some time but I have one that kind of fits in with naruto. Kimimaro and Sasuke trained their CS2 enough that they were able to use it longer with less risk of injuring themselves right? What if the more you use Curse Seal level 2, the more turns you can use it for ( note there will be a limit of turns you can reach) will a less chance of "injurying yourself", (note there will still be risks of injury if you use it). It could also be possible for te power of the seal to increase, if only by a little.
There is also the idea of using it too much in one day. Obviously everyone with the curse seal has their limits when using it, if they used it too much at one time they would eventually die. What if we did this? Everyone, even people whom hve had Level 2 for a long time will start at 0 and will have to work their way up to use the level 2 with a less chance of dieing. I think that you should have one free use of it without the risk of dieing, and after that the chances kick in.
For example:
First time user: 90% chance of dieing, chances increase if you keep using it sa well as a drop in the turns.
Long time user:50% chance of dieing, chances increase as you keep doing it as well as a drop in the turns.
It would be a lot more difficult but also have more to gain from it.
If you could post your opinion that would be great. Thank You.