I would avoid having to use a hanger extender (Wolf Tooth as example) as it will increase the amount of open chain between the cassette and the guide pulley IN ALL COGS. Often resulting in loss of shifting response when riding in the smaller cogs. One of the goals of Shimano using the slant pantograph parallelogram, a spring loaded B pivot and a pulley cage with the guide pulley axis offset from the cage pivot was to minimize this amount of open chain.

If you get a chance read "The Dancing Chain" by Frank Berto. He describes (among other things) the design elements that ders have used over the years and why some survived to today and why other elements lost out and left the market. Andy