[lch]

The suggestion of locking the RP set into magic paths is a really old one. That was one of the first things that I wished for when I've been playing Dom2, too. But it really makes no sense whatsoever to put points into more than two schools at a time, the first what you want researched right now and the second for leftover points that you plan to spend elsewhere after you reached that next level. Sometimes it's not really exact, but I think that you can always achieve to spend points up to +/- 1 point at least.