I find that I waste far fewer sheets of paper by doing a straight test strip and then estimating the exposure time for the lith print. I know what look I'm going for so from the test strip I can decide on whether to expose the lith print 2 stops over or 4 stops, or anywhere in between.
If that's being too clinical, well, then I'm a clinician. One of the nice things about lith printing is not only all of the variables involved in the chemistry/paper but also in the methods used to arrive at the final print. There is no right or wrong way. Just the way that works best for you.