Yeah the rash that can happen with Lamictal is Steven Johnson's Syndrome which is very rare as the OP stated. They build up your dose to lessen the risk.
I'm on the meds on my signature line but lately I think they're not working. Of course I have been drinking alcohol on occasion and I know that messes with the medication. Seroquel for me is a lifesaver that I use when I totally lose control of my emotions. I think I need to either up the Effexor or change the mood stabilizer. At one time I was on Lithium instead of Valproic acid and I think I did better. Let us know how it goes HD.