Let me specify what an algorithm is, on the H8000FW.
A structure of modules providing more than a single FX can be an algorithm.
So 2 algorithms may give you 10, 12 or even 15/16 fx as a general possibility of calculations. The number of fx fitting in an algorithm depends on the size of each fx and its impact on the DSPs resources. You can have 4 monster quality stereo reverbs, or 8 excellent ones….or 12/14 good ones….. depending on their design.
It's an open universe that can be managed using resources in many different ways.