I'd like to add another point to consider. It's kinda...extreme but IF said we could get the info from Dorri. We know some of the things done to Eric. We could potentially "break" Dorri for the information.
Edit: I do not advocate nor condone Torture. I'm just putting the option on the table.
That would mean that we would have already defeated Dorri, wich would make the information useless.
Also, torture is a really bad method to get reliable information.
If somebody dosen't say anything after a death threat, then they either don't know anything or are crazy.