I don't know much about bear attacks but if you shoot one at night at 25m+, to me, it doesn't sound like self defense. In a scenario where you are defending yourself, it seems to me that the bear has a high likelihood of being on top of you in which case you won't be able to shoot it with a rifle.
Seattle Backpackers Magazine explains that despite the recent news stories, bear attacks on the trails are pretty darn scarce.
seattlebackpackersmagazine.com
This article (written in 2010) claims that there have been 6 bear attacks in washington state since the 20's.
The Washington State Department of Fish and Wildlife’s record of bear encounters lists 14 cases in which a person was injured and one death. Nationally, hornets, wasps and bees were responsible for 28% of animal-caused deaths, and dogs about 14%.
www.seattletimes.com
This 2016 article claims 14, with 6 related to loose dogs and 6 related to bear hunting.
You might be more productive if you do some more critical introspection on what you're trying to accomplish and why. I'm not sure the best defensive set up in the woods is going to be an ar15 with a nox. It sounds like your goal is to take hikes safely so your priorities should probably look like: 1) navigation 2) awareness 3) shooting in defense, so I'd gear your equipment in the same direction. Bino i2 is going to be way better for navigation, and your coti is going to suffice for awareness/detection. For shooting... if you're far enough to where you can't hit the "assailant" with a pistol, I would almost never consider that shot to be defensive... animals don't have ranged weapons, and if your woods are thick you're not going to have them start charging from 20 plus meters away.