How much will not wanting to gain weight and potentially pack on muscle hinder me in increasing vert? I'm kinda trying to increase my 1 foot and 2 foot vert more concurrently now too, and I know that at least for 1 foot I can get away with being skinnier and having less muscle mass. Also, my understanding of lifting for vert training is that you lift to build muscle in order to increase "relative strength"(or i think thats what its called), and not to gain movement efficiency for any of the lifts you do.
But what about if I struggle gaining weight and at the same time want to improve my relative strength? Will the inability to pack on muscle affect it at all? I feel like if I increase my deadlift without gaining any weight or putting on muscle that I wouldn't actually be getting stronger/increasing my relative strength, I would only be getting stronger at deadlifting.