Any
rda is safe as long as the 510 pin protrudes beyond the threads of the 510 connector.
Here's an example of a safe pin (I know it's an RDTA) - you can clearly see the pin extends past the threads on the 510 connector:
The only other suggestion would be to get something with BIG airflow as the Cricket is going to throw some serious wattage, depending on your build of course.
I am currently using a Velocity mini clone with a single clapton coil and the airflow wide open and it gets warm, but I am not normally a high-wattage vaper.