With the recent update to shadow pips shouldn't you also consider some sort of adjustment to the donate shadow pip spell? The update takes the randomness out of it and now a considerable number of rounds and or a certain amount of rounds need to go by before a wizard has gained the 2 shadow pips required to cast.
Not sure what to suggest as far as an adjustment goes however if one isn't made I will likely be dropping that spell the next free training point buy back members benefit.