To quote myself again, since our friend Lian seems to be fired due to the lack of information he provides.
Levels 7 and 9 do not have an increment of 10 points. My progress is at level 10 now, so I don't have info on higher levels yet.
This leaves the required number of points at 1350 - 90 - 70 = 1190 maximum. So the 1230 points for all challenges are (for now barely) sufficient.