I have my Brocchinia in a terrarium with Heliamphoras, some
S. American Drosera and Utrics. It's in a very peaty pocket with
the water level 2" or so below the surface, and bright fluorescent
lighting.
Prior to filling the terrarium it was in pure peat, in a full-length
5" pot in 1/2" water on a sunny, south-facing windowsill.
It's grown steadily, produced a pup, and seems happy in either of
these environments. It doesn't strike me as a demanding species,
though I've only had it for less than a year.
It's a comparatively slow grower I guess, but these things are
relative - it's a darned sight faster than most cycads.
Hope this helps,
Peter