Love this. I use Gatorade as my base flavor and just add sucrose and sodium citrate for about 80% of the total carbs and sodium.
Sucrose beats the osmolarity of malto+fructose, but is probably sweeter overall. I find if I keep flavor mild, (low Gatorade concentration), that I can tolerate very high sweetness from sucrose just fine. If Gatorade concentration is too high though it becomes completely unpalatable.