At this point, I wouldnt do much more than defoliate, you should start flowering any day now because they're autos. Also you have no reason to defoliate right now anyway, she's not very bushy... amnesia is a long growing strain anyway, so you might get a couple more weeks before flower so if you really want to do LST, start now. My current grow, all I've done is defoliating and bending without ties and I have colas all over the place.