Cones are used for ascetics only. They cover the "eGo
Threads" and / or cartomizer.
For dripping, I would recommend a shorty 510 extender, atomizer, and drip shield.
The 510 extender so you don't get
juice all over your twist's
thread's and 510 connector in case you over drip (you will over drip if this is your first time). The drip shield contains the over dripping so it doesn't leak all over your battery and acts as a heat sink since these can get pretty warm.
Here's what I'm using at the moment:
Here's the setup I use. I was trying to find a link to the simple thread cover that I use, but I couldn't. The drip shield slips nicely behind it:
Note: I don't have a twist, but its all the same from the button up. Since you are using a twist, I'd recommend a higher resistance atty. Maybe a 2.0 or 2.5. In my experience, 1.5 is perfect for the 3.7ish volts I'm getting, but pusing the 2amp limit of the device.