You could do like me and play only with the unlimited potions option on(Num4), that avoids a lot of trouble. Including constant crashing.
Ever since I started playing with that option only, I did not crash a single time, and that's 22+ hours of gaming.
I ended up following this advice with my reaver-specced warrior, and it worked well. It certainly qualifies as a work-around, but so be it.
That said, I was underwhelmed by the Reaver spec in general and wish I had chosen another. I attempted to role-play my warrior as the Inquisitor who becomes increasingly power-hungry, and I envisioned the Reaver spec as a more brutal, even evil, choice. However, the spec seemed to have no impact on the story outcome.