I've used pre-bleaching (SLIMT) to get into negative grades.. to make prints that were too contrast/large range to print with Grade 0 (and by a very long margin).

Straight print with SLIMT that fits in the range, makes it look flat.. because well you're fitting in a massive range.. split-grade print with SLIMT however was damn good, at punching up contrast while fitting in the range.