Huh? Why? Don't you almost always descend below the MSA while on radar vectors? Min vectoring altitude(MVA) is, after all, usually lower than MSA. Do you refuse a vector below MSA? If so, good luck ever getting vectored below an overcast layer and then being cleared for a visual approah. You'll be costing your company a lot of fuel...
So again. Why are you briefing MSA?
As far as I can tell, it is only useful in cases of lost comm while on a vector. That's about a 1/1,000,000 type thing. And when it happens, there's no way in hell you will have remembered from the brief 20 minutes ago that the NE quadrant MSA was 5200'.
There may be a good reason for briefing it. I just haven't heard it yet.