Generally, High Drains are preferred because of their high discharge rate for those dual coils. If you wish to go protected Trustfires and ultrafires, it's still okay. Just that performance may not be up to your standard. And please check if the batts are suitable with your mods.
http://www.e-cigarette-forum.com/forum/general-e-smoking-discussion/168171-18650-battery-wars.html
thanks for the link noah~~ i go read now