Alot of guys doing very heavy cycles will run 10-20mg nolva ED in addition to running letro/stane. If I was running a moderate-high dose of a compound that has a high aromitization rate, I would definitely consider throwing in 10mg nolva.
edit: I would be very hesitant to run nolva with a 19-nor because I believe it can actually agravate prolactin induced gyno