Got the Oceanus in, a solid mod, the Ammit 25 fits perfectly. I like the simplicity of the user interface, and the 20% boost function.
I really like my Pulse bf squonk setup ( Simple, consistent, no leaks, filling is easy with the 510 refill bottle), but there are times when a regulated mod and tank are good to have.
Time to run the Oceanus with the ampking batteries for a couple days, see what the run time is like, then a couple days with my Sanyo 20700b batteries, get a performance baseline.