Over the course of Beta, I first stacked AGI, then switched to stacking DEX to hold aggro better. Once I got better weapons, though, holding aggro didn’t seem to be much of a problem anymore.
After that, I started stacking STA since it helps with casting and reduces interrupts. Now, with our faster-casting spells, I think I’m going to go back to stacking AGI.
I don’t really care about STR since I’m there to tank, not do damage. I feel pretty much the same way about INT, although this time around I’ll probably focus a little more on INT if the DoT ends up being worth it.