I thought the magical crit prayer is available at 105, at my surprise its at 110, thought I will be having a break at leveling when I enter 105. :V
I would also suggest that if it is possible to add a low Int/Wizardy lvl buff just to help a little about its magical atk, I know you said that it should not be competing with mages with Ma.atk, but as a warrior class that is about support and features the use of INT path, dont you think its just appropriate? Anyways, other players would need to still invest a lot if int/Ma items just to be at mages Ma lvl, which is for me still hard, not many players can get WR, Bach Ma, EDS, Gemini, Farouks etc, with this I think crusader would be a Job that others might think of playing.