hey i don't know the answer to your topping question cause im personally unfamiliar with those strains (im sure someone can answer it tho). As for the lighting question, if you want lower bud development you don't necessarily want a higher wattage (altho that will just make all the buds bigger in general of course), you want supplementary lighting- like lighting pointing at the bottom of the plant. a 600w is much superior than a 400w tho.