I'm not sure I understand your question. By 5 bus do you mean a triple fed system with left and right gen, centre, triple fed and battery bus? If so, I believe most triple fed systems have the newer GCU's that won't allow you to do a cross start.
So there would be no reason to turn the generator off and then back on at a specific n1. In fact I don't think you would find a procedure that would specify the n1 required before putting the generator back online.
If you were using the older GCU's I wouldn't do a cross start often unless you wanted to purchase a lot of current limiters.
However I did notice that our engineers started our old straight 200 without turning off and on generators. When I asked them about it, they showed me the starting procedure in the maintenance manual it didn't indicate a need to turn off the generator. The manufacturer's POH did however.