from the looks of it, those are all 510 threadings. The tanks, look like a combination of the old style ce5's and a cartomizer tank. I never used that style so i can really comment on tip or issues. If you are getting a dry hit, its not wicking fast enough. Several things can cause that including using a very heavy vg
juice, which from the looks of it they are selling what is called dekang(china juice) which is normally pg based so i doubt the juice is at fault.
You can always check out a local vape shop and see what they have as far as toppers go and getting something that better fit's your needs. anything 510 will screw onto the battery.