Is it permitted to have a small raised area of deck to house mast partners and a mast ram at the mast point and a small recessed area just aft of that point?

Yes. D.2.3 (d) (1994 CR 6.3.5) allows for a limited amount of transverse deck round, being 1/24th of the beam at any point. The class rules do not place any fore and aft or transverse restrictions on deck camber, only that it shall not exceed the permitted amount.