As with Raptor I also use Av mode almost exclusively with a bit of help from Exposure Compensation. Yes, there is a risk that you'll have the camera set to a small aperture which will result in a blurred picture when the photo is taken in poor light. But it helps to use a little human touch to estimate what the conditions are like, and start opening up the aperture as soon as the light goes bad. And this happens even before I put my eye to the viewfinder.
On the odd occasions that I use Manual mode, it'll be for static night shots and maybe the rare Bulb shots. I'm just slow and prefer the speed at which Av mode works...getting the shot is what matters most.