Sinope was conquered later on, in 275 Pontus was pretty much confined to the area around Amasia.
The sacred band were definitely heavy hoplites ("armed in the greek manner") and while it was never mentioned anymore as a unit it represents the cream of the citizen militia, which fought intensively in the truceless war (likely in the classical form) and the 3rd punic war (where it was likely reformed in the thorakitai style).
The switch towards heavier liby-phoenician units is represented in game, both early with lesser quality civic units and later with them replaced by liby-phoenicians.
If you wish to discuss historical accuracy issues then you should also provide sources to support your point of view