Some of the newer subohm tanks have adjustable juice flow that could be really helpful with thinner juices. Check out the Delta II to get an idea of what I'm talking about.
I'm using an Atlantis and a Subtank Mini right now with 50/50 in the Mini and 70/30 in the Atlantis, no issues with either. 32 watts + largest airflow port shouldn't be an issue.
How old is the coil?