I got an iSub G tank for my Disrupter and have been using it today. I have been 100% sold on Aspire's
tanks for a long time now. The Subtank, mini, and nano all gave me dry hits, and so does this G tank. Back to my Nautilus and Atlantis
tanks I go! I don't know why I insist on trying to find a good tank when I already have the one that works best for me! I NEVER get dry hits with my Aspire
tanks. You can use your Protanks on your Disrupter, but it sounds like you might maybe possibly try something a little sub ohm? If you are, my vote is definitely for the Atlantis. You can get 1.0 and 1.2 ohm coils for it, too, so if you don't like sub ohm you can always make it NOT sub ohm!
This is just my personal take. YMMV.