When I came back I made a tank and have been levelling him and I'm now up to Con 95 so still 5 levels to go, on the STR XP I've already passed WoC 1 and am currently at 310 mil STR XP so by the time Con is 100 i'll probably have all the STR XP in the universe.
Which seems wrong to me so either tone STR gain down so that you don't accidentally get WoC trying to cap another stat or increase the CON gain so that by the time you've reached WoC STR you are at the CON cap.