8-Layer Stackup question
The main consideration is that any high speed or sensitive analog tracks should run over an unbroken reference plane. This could be a power plane or a ground plane, but these sensitive tracks shouldn't run over a split in the plane. 

Without knowing more about your design I can't say whether you have enough ground planes or if you need to figure out how to use fewer split planes and more ground planes or if you even need to use a 10 layer stack-up.