Samus is for sure ahead of Mario. Cloud is for sure ahead of Crono Crono is for sure ahead of MM.
Those are the only things we know for certain.
(Anyone arguing 7-9 is fucking deluded one way or another).
A lot is going to depend on Samus/Mario Cloud.
If Cloud is blown out, then that's it.
ONE HUNDRED PERCENT NON DENIABLE THIS IS THE ORDER
1 Link 2 Samus 3 Mario 4 Cloud 5 Crono 6 MegaMan 7 Snake 8 Sonic 9 Sephiroth.
If you want to argue that, shut the fuck up, you are wrong.
If Cloud blows him/her out.
Then you could actually have
2 Cloud 3 Crono 4 MM 5 Samus 6 Mario.
This is known as the best timeline.
If it's a close match however... then we can actually run in to this funness.
Link
Cloud Samus Crono Mario MM.
Legitimately splitting 3 different 50/50 matches with a character in between.
But more than likely Cloud is going to murder Samus/Mario and we just have to find out (through sff on Crono, so have fun) where Crono/MM slot in between the other 3