If Mastodon never get around to a greatest hits package, Live at Brixton will do the trick. Captured at a February 2012 gig in London, Brixton finds the Georgia prog-sludge mainstays barreling through 23 choice cuts from their five good-to-classic LPs, 2002's Remission through 2011's The Hunter, a typically remarkable performance from a band whose live prowess rivals their in-studio wizardry. Like most overviews, the song selection's arguable, the impact of even the highest highs altered in thei...