I'm a side sleeper and I'm looking for a better sleep system than the mummy bags I've always used. The problems I'm currently trying to solve are outlined logically as follows:

Problem #1:
>I occasionally switch sides during the night
>I would prefer not to breathe directly into the down insulation of a mummy bag hood so as not to wet it out
>therefore, when using a mummy bag zipped up, I need to shimmy the entire bag around with my body as I turn on a narrow pad
>this requires more effort/burning more calories than I expend in bed at home to accomplish the same thing, which has the consequence of waking me up/making me less comfortable + repeat ad nauseum

Problem #2:
>most sleeping bags use latitudinal (horizontal) baffles, which works fine for back sleepers, who present their flat chest and stomach to the sleeping bag
>when your body is laying on its side, you present a "sharp edge," i.e., your shoulder and hip, upward for the bag to rest atop
>this has a tendency to split the insulation in those baffles and encourages down to migrate, with gravity, away from the peak of your body
>this creates cold spots in even the best down sleeping bags

I'm thinking about getting a hoodless bag, like pic related, with longitudinal down baffles, and then putting on a down balaclava (yes, they make them) on cold nights, which would stay oriented correctly on my head if I changed sides at some point through the night. I'm just not sure what temperature range I'd be comfortable wearing a down balaclava. It can start to feel warmer at night around 4:00-5:00 am, but if I wanted to sleep until 6:00 or 7:00 am, will my head just be sweating like crazy inside it the last few hours?

I know there are other solutions, like a hooded jacket, but I don't like to wear my jacket while sleeping (uncomfortable at my armpits when I switch sides, and also doesn't insulate as well as if I were to drape it on top of me in my bag).

How have my fellow side sleepers dialed in their sleep systems?