I saw in your other thread, you said you were having trouble. Wicking trouble, like burnt hits?
If so, I can tell you that on some devices you'll just have to either drill out the wicking channels to enlarge them or upgrade to a device that'll handle it naturally.
70vg is thick. I use 90vg and had serious issues with the Subtank series RTAs. Some just aren't meant for it.
As
@MMW has suggested, the Bachelor RTA should do exactly what you need it to do.
Edit - if purchasing a new device is not an option, you can add some distilled water to your juice to thin it out a bit. I've never done this personally, but I know many who have had success by doing this.