The E80T5-Ni3 will make your properties at that CVN temperature. Last time I checked, ESAB didn't make that wire. ESAB does make an E80T5-Ni2, but even though ESAB does make some very good wires, their basic slag wires I have used leave some room for improvement. (More spattery smokey compared to some other basic slag wires). The only manfucaturers I have found that make E80T5-Ni3 is Select-Arc in Ohio, and Devasco in Houston. None of the Ni3 wires tend to run very smoothly, and you will probably get some complaints from your welders. It is just a hard composition & properties to make and have a smooth running wire.
A wire I have used before that does run much better than the Ni3 wires that might make your -75F is the Select-Arc 812-K2. I qualified a WPS on A352 LC1 with it.