Wright-Phillips became new manager Chris Powell's first signing when he arrived from Plymouth last week and is in line to make his debut.
And he is likely be partnered by eight-goal striker Benson, who returns from a three-match ban following his red card at Colchester on New Year's Day.
Defender Federico Bessone, the deadline day arrival from Leeds, should also be in the squad.
Winger Johnnie Jackson, the Addicks' top scorer with 14 goals, is expected to be fit despite limping off against Plymouth last week with an ankle injury.
Saturday's trip to Rochdale was postponed, giving Jackson an extra couple of days to recover.