Wright-Phillips became new manager Chris Powell's first signing when he arrived from Plymouth earlier this week and is in line to make his debut.
And he may 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.
However, Powell has plenty of attacking options after Scott Wagstaff and Liverpool loanee Nathan Eccleston were on target in the 2-0 win over Argyle last Saturday.
Winger Johnnie Jackson, the Addicks' top scorer with 14 goals, will be checked over after limping off with an ankle injury.
Chris Solly is back in training after ankle surgery but fellow defender Kelly Youga (knee) is still out.