The point of Goyf Sligh in the first place is that the creatures it adds, in comparison to straight Burn, give the extra gas to do the full 20 without frantically trying to get the last few points in before losing. Going to the extreme with guys like Bloodbraid Elf aren't necessary at all.

as opposed to burn with a lower curve that just wouldn't have enough to finish.
That's exactly the reason I do run the Incineratre, because I generally want to draw into burn rather than guys because that is what finishes. The only time I want to be drawing creatures is in my opening 7... after that, I'd rather see nothing but burn.