Cant really see how big your cloud is blowing it directly into the camera...even little clouds will fog up the camera lens...
I ve found it alot easier having someone video my cloud as I blow it and then edit a screenshot for my cloud pic..
CloudBeast with the T-10 coil head
at 140w on my RX300..I hear smok is coming out with the King CloudBeast that uses a T-12 coil and rated up to around 300w.. lol