My opinion is there is no good Lawrenceville wiggle. I climb straight up main most days, but for people who prefer not to do that here's what I got...
From upper lawrenceville:
Pretty much just climb fisk from butler, cutting over to main st via geneva.
From Lower lawrenceville:
36th to bandera to 38th, cross penn, go left on cabinet st to main st.
Or
just climb up 39th slowly, cross penn and hit cabinet st to main st.