As an NI Soul Troop mainstay, Donal Scullion is more than familiar with the nuances of jazz, funk and, of course, soul, not to mention the work that goes into arranging tracks that bear those generic attributes.  This is what contributes to Scullion’s grasp of composition and style on his debut solo offering Superpowers; an album that is full of all the tropes of big-band splendour but tows the line quite sweetly between the singer/songwriter and pop-soloist milieus.  In theory, that’s a tall order and not without its pitfalls, but Scullion has obviously approacehed Superpowers with enthusiasm and vigour, and…