I am a battle sage with 15 skill points not invested. I don't need them to get to 99. I'm 96 right now, which means you have a week or two to get endows from Albus Dumbledore if you want them. PM me in game on that name if you ever need an endow. If I'm not in ID3, I'll come endow you for free (you bring the stones).
15 points is enough to max all but earth endow - so as long as you don't want that one we'll be fine