I'm a MTL vaper and have only used the 1.5Ω Clapton coils.
The first couple tankfulls I used it like a previous tank (a Nautilus)...
8-11 Watts and making sure the AFC was
closed before screwing on the top.
It gurgled/flooded horribly!!!
From the 3rd tank on...I cranked it up to
11-15 Watts and made sure the AFC was
OPEN before screwing on the top (and kept my index finger over the drip tip opening).
It's now "Tootle Puffer Heaven".
[I now like my Cubis so much I bought two more ($14.45 each) at the recent May Day FT Sale!]
..