Growing Plants of Different Heights in SCROG

What is the most efficient way to grow plants of two different heights (Say Super Silver Haze and White Rhino or Blueberry) in a Screen of Green? I have never grown a SCROG but have recently researched the method and am planning to grow using it soon.

My intuition tells me to use something underneath the indica to lift it up closer to the light during flowering so that it gets the same amount of light as the naturally taller sativa (and the colas line up with the screen). Would this be a viable way of doing it? Thanks a bunch in advance guys.

That's exactly what I do, if some plants are much closer to the screen than others -- I put some books or whatnot under the shorter ones, to get them to the screen.

Also, let's say you have a 4'x3' area and six plants, two rows of three plants. If you have four taller strains and two shorter ones, put the taller ones on the edges and the shorter ones in the middle, creating a kind of makeshift coliseum grow. Basically, always keep your shorter plants closest to the light.