Jack Keller has put massive amounts of energy into compiling wine recipes for most anything your heart could desire.
They (the recipes) work well as a starting point for a lot of the shenanigans that happen on this forum. His recipes are usually low in flavor, with an alcohol content comparable to rocket fuel - they generally call for adding more sugar than the proposed yeast strain can handle, which is an attempt to eliminate the step of backsweetening. He hopes the strain will die off, and leave behind residual sugars.
The problems with this:
1. The yeast could die off early, leaving too much sugar for your taste and not enough alcohol for the wine to keep properly
2. The yeast could refuse to die (depends on the strain) and you could end up with rocket fuel and no residual sugar. Like perhaps the wine calls for a packet of D47, and all you have on hand is EC-1118
3. In almost all cases, the high amounts of sugar will cause the yeast strains to stress, especially if there isnt enough nutrient & energizer - this can lead to off flavors, fermentation problems, etc
This is why i suggested the SG in the 1.080-1.090 (11-12% ABV). It will practically ensure that whichever yeast you use, can handle that much sugar and ferment it to "dry". At that point, you can add sulfites & sorbate, wait a week, and sweeten/flavor to your liking.
If it doesnt have enough kick for you, when it hits the 1.010-1.020 range - instead of racking to a carboy, you can add a measured amount of sugar (adding blindly might give you a trip down rocket-fuel-alley) and wait for it to get back down to 1.010-1.020 range, then rack to a carboy.