I don't even worry about humidity unless it rises above IDK 65%.
I believe that temperature is more important than humidity and it sounds like you have a decent idea what to do.
The temperature of 65 degrees is nice and you can go up to 75 and still be in ideal conditions.
Start your grow and keep us posted.
Edit seedlings will need higher humidity levels for about the first week of grow, but I have grown many sprouts by just sowing the seeds into the ground and keeping the ground moist. Outside in the desert, no humidity dome, just shade..