Spotlights occupy the space between a push-and-pull of jarring metallic catharsis and sweeping distortion. Even as either side vies for supremacy, neither extreme ever completely tightens its grip, allowing waves of melodic vocals and expressive sonic sorcery to breathe in the middle. This deft balancing act has enabled the trio—husband-and-wife Mario Quintero [guitar, vocals,keys] and Sarah Quintero [bass, vocals] joined by Chris Enriquez [drums]—to carve a singular lane. Armed with an uncanny ability to wield darkness or light, the trio’s fourth full-length offering, Alchemy for the Dead [Ipecac Recordings], finds them exploring something we all face, yet few embrace…