that's actually a great question, and you know what i does depend on genetics, i have had XXL strains that take to LST and beast out but take 12 weeks+ and i've had some that dont take to LST , and some that benefit from larger pots (10 gal +) and some that dont. For your specific gens your critical thunder will be a large yielder that takes well to LST, BB3 is a great plant to LST, but the wedding cake and durban poison i've only let them grow , so i dont want to commit but you're probably pretty well off if you want to LST them... just one thing about autos : i havent really had much success LSTing after like the third week of veg. Hope this helps !