Clobetasol worked well on my lesions. My derm, who interned with a lupus specialist, did not recommend laser treatment. He said it can irritate discoid and cause a flare. Kind of how Michael Jackson continued to have issues.
Discoid is different than SLE rashes. Left untreated, they are scarrring.
Best advice is to stay out of the sun and practice sun smarts!! High SPF, hats, long sleeves etc....
Hope this helps!