I try and stay away from any sweetness as I can, yes that means refraining from many processed products, which I'm capable of. Honestly, it is the way to go. I've noticed sweetness sets off a trigger in my brain, possible some norepinephrine whether it be stevia, sucralose or sugar, etc. Yes, so now I mostly live a life stevia/artificial sweetener free. Sometimes I make a purchase of whey with sucralose, mainly because I run out of protein powder and can't find and unflavored/unsweetened product in a retail store. But overall, I'm telling you an unsweetened/unflavored route is the one to follow. I Now a days I love the taste of BCAA plain, casein powder plain or piracetam plain, etc, etc. It tastes great!
Now 180 that
The best sweetener mix, in my opinion, would be stevia/sucralose OR sucraleen brand sweetener from VPX. (Wish they made some better products because that artificial sweetener tastes the best) I do think it is a good idea to mix stevia with an artificial sweetener. Artificial sweeteners are very acidic and stevia is heavily alkaline concentrated. Mix the two and you should cancel out the acidic pH.