Watch the Applying The Box F#m7 - C#m7 - B5 - E5 online guitar lesson by Robbie Calvo from The Power of Five
We have 4 potential options of minor pentatonic scale over this Aeolian progression. The 3 standard options from the key of A major, F# minor,C# minor and B minor. A note of caution though when using the B minor pentatonic, the D note, which is the Aeolian characteristic note sounds pretty weak to me. Use it to color your lines but not as a resolution.
The 4th option is to use the G# minor pent. This will yield a D# note, to my ear sounds a little more palatable than the D but it's all subjective. The thing I do like about adding the G# minor is that it gives us the ability to glide between it and F# minor for some really smooth licks and lines.