It's not inferior, it's just better for my group and for the strategy we were using. I'm pretty sure people can make WHM/SCH work (like they have been doing), so it's just about playstyle and what's better for your group. Sometimes, you just have to admit you're not skilled enough or not comfortable enough to do something. My WHM hates solo healing and likes to use the new DPS tools WHM got, so SCH is not a very good partner for him. He can pull a lot of DPS as a WHM and he just has more fun doing it that way. Since I don't like to DPS, it works pretty well for us to do WHM/AST. It's not gospel, just know that there are ways to make things work.