How do I save this plant?

I recently transplanted a plant from outdoors to a growbox and either from root damage or bending it under the SCROG netting the plant suffered a lot of stress. Within 2 days most of the leafs were dry and brittle. I thought it was a lost cause but I left it in the box to recover. It has now started to sprout new fresh leafs. I know this plant is never going to be the same again after almost dieing but what would be the best way to save it now? Do I need to cut off the old dead leafs? Should I give it less or more light? Water? Ferts?

hard to say with no pics but get the dead shit off and the new growth will be fine...but the old dead shit wont come back unfortunately