Hey Growmie,
Polyploid cannabis is a chromosome-related variation of normal cannabis. It offers the possibility of heavier harvests and stronger effects. It's currently only something people experiment within their own gardens or by Big corporations in high dollar labs, nothing that's available as far as seed banks. The multiple tops would be the success of your great LST. Hopefully, I answered your question and remember ..."Happy Growing" and "Free your mind one puff at a time"