I could, yes. Though while I think having a high achievement % is nice, I don't pursue it that hard. If I don't get an achievement organically but have to spesifically hunt it, I probably won't bother. Putting 1 level in each class is pretty stupid from any perspective. So I'd probably only get the achievement if I cared to through the way others mentioned, respeccing into it. And then probably pressing quickload.