Yeah, monkfruit and erythritol seem like a good pair. I'd probably add a tad of stevia too, but that's me. I find those three work pretty well as long as you don't try to generate all of the sweetness from them. Using them 50:50 with sugar or dextrose seems like a good balance. I liked xylitol for a while, but the cooling sensation and the gut bacteria effects turned me off.

I personally won't use xylitol in my house due to the risk of my dogs getting it, though I understand others don't face that risk. :)

Yeah, the 50/50 approach with sugar can work - I just try to remove as much as possible or eat fruit if I'm craving sugar.

Have you tried rice syrup?