Li Shenron
Legend
KaeYoss said:
I don't think it was ever intended that these bonuses stack. It wouldn't make sense anyway: you aren't suddenly twice as intelligent as before, just because you learned to be a duelist in addidtion to a bladesinger.
I agree with you KaeYoss, and with Hypersmurf: I don't like being a rules-lawyer - although I am

I always thought that getting your Int (or whatever ability) bonus to something means to be able to use your Int as extra help to something that usually gets no help from Int. E.g. the Monk Wisdom bonus to AC: beside Dex which always helps AC, a Monk can also use a high Wis to improve its defense. A PrCl which gives the same, provides you with the chance of using your Wisdom in the same way, but it doesn't make sense to use it twice.
There COULD be a special ability that e.g. lets you use TWICE your Dex to AC (just like a 2-handed weapon uses 1+1/2 your Str bonus to damage), but not in the general case - plus such an ability is easily exploitable and I wouldn't like it anyway...