The general rule is not to shave before electrolysis as the tech need to follow the hair to the root(follicle). For laser you need to be shaved as to use the laser to zap the follicle and not the hair.
As for pain killing you may want too talk to Sandra Jane on staff, you can pm her, she is professionally trained in this topic.
Happy Zapping
Oh the pain is worth it. I know that doesn't help but it is awesome to look in the mirror and just look, look, and look. And think - I don't have a beard anymore.
And cry, happy tears.
Hugs
Cindy