I don't have any leaking issues with my Freakshow or Mad Hatter v1 (same deck), though condensation can be a problem.
Make sure your wick (even little hairs) isn't touching the lip of the air inlet and don't overdrip. Your
coils also should be centered over the airflow, not inboard of it. If your wick is rayon you need more of it in the coil.
Bottom airflow RDAs are certainly more leak-prone, so you need to take extra steps to make sure your build isn't contributing to the problem.