Actually, if you read the Halo website page for the variable voltage batteries, they suggest that if you use the variable voltage batteries, you should use the higher resistance coils. I believe that is because if you bump up the voltage, but are using low resistance coils, you will be pushing more watts than the clearomizer can handle, thus getting burnt hits.
If all you're after is to get more vapor, then using a higher VG ratio. If you are currently using Halo juices, I believe they are high PG juices. Even going with a 50/50 juice, the Halo Triton with the standard (non-variable voltage) batteries will produce a good amount of vapor since the 50/50 juice will have more VG than the Halo juices. When I was still using the Halo Triton, I was able to successfully use 60VG/40PG juice with the standard battery without getting a dry hit. Just make sure that you don't let the tank drop below 1/3 full, and also tip it over from time to time to make sure that the wicks are kept nice and wet up at the top.