LST and Topping

I suggest you separate the techniques and apply separately. You can over stress cannabis and it leads to outcomes you want to avoid. Try topping first (once). Wait 7 days before you take any additional options. At that point it should initiate new growth. Can be explosive growth depending on the strain (some like being topped, some don’t). If you need to train your plant because it’s growing so vigorously thats a good sign. At that time try applying some training techniques to manipulate the canopy for the space you’ll be flowering in. Hope this helps. Good luck