You've got some great recommendations here. Would like to second the following:
Try variable voltage. Vamo, Twist, or any other that tickles your fancy.
I love mint so vape it a lot and know it helps me with TH using low nic juice (I'm down to 6 mg now).
I've found cartos are one of the better performing juice delivery methods I've tried. And the more vapor your PV makes, the better TH tends to become. I've found carts to be significantly better than unmodified Vivi Novas.
HTH