If it spawns in different locations the distance to the rift will change, unless it's a few locations that are equal distance from each rift. Take banner fall for example, it would work if the spark spawns near the tree heavy, near the inside planter heavy and it's current point. Anywhere else creates an inherent disadvantage to the team it spawns closest to. Imagine it spawns inside the alpha building.. takes a runner 2 blinks to slam.