Let's say you are playing over a minor II-V-I progression (i.e. II = minor 7 (b5); V = 7alt; I = minor 7 or min-maj 7). If you use the 6th mode (Locrian 2) of the melodic minor scale over the II chord, do you use only the ascending version and not the descending melodic minor scale (i.e. the natural minor scale)? For example, let's say you are playing II-V-I in B minor. The II chord would be a C#-7(b5). You could use a Locrian over this chord (i.e. seventh mode of the D major scale) and you could use the Locrian 2 (i.e. 6th mode of the E melodic minor scale). Played ascending, the Locrian 2 contains C#, D#, E, F#, G, A, B, which are also the notes in the E melodic minor scale. Since there are no "avoid" notes in the melodic minor scale, you could theoreticlly just play the E melodic minor scale over the II chord. However, the descending version of this scale is the E natural minor scale, which does not contain C#, the root note in the original II chord (i.e. C#-7(b5)). If you played a C# natural minor as the descending scale, you would be omitting the b5, which is one of the main defining charactistics of the II chord in a minor II-V-I. So, back to my nerdy question: Do you just use the ascending version of the Locrian 2 over the II chord of a minor II-V-I?