FWIW, I spent years experimenting with different methods and temps for hop drying. I use a fod dehydrator. I had less than stellar results until I went to Hop and Brew School and found out how the growers do it. It turns out that hops will start to compost themselves within an hour of picking and you want to dry them as quickl;y as possible. The growers use 130-135F. I tried that and it worked like a charm! Took about 3-6 hours.
So, I'd turn your oven on the lowest temp, then put an oven thermometer in it and turn it off. When it gets down to about 130, put your hops in. An hour or 2 should do it.