I might be misunderstanding what you mean by “Sel Mix PAFL Scene” so forgive me if that is the case. I am also not at the IP8 so I’m going by memory…
I think you are correct that Sel and Mix are not available if the IP8 is connected to a Mix Rack directly (Mix Rack->controllers). But I’m pretty sure they are available if the IP8 is connected to a Surface (Surface->Controllers). If you are wanting to use an IP8 without a CTi1500 for monitors, then you might be using Director anyway and you might be able have Director act like a Surface and the IP8 connect to Director.
PAFL might be similar to SEL and MIX but I’m not sure….
I know for a fact that the keys above the faders on the IP8 can be configured for scene recall, at least if the IP8 is connected to the Mix Rack. I can’t remember if there are differences between the fader keys and the layer keys in that regard.