Ruiz has hit only five goals this season, after notching just two the previous campaign following his big-money move from FC Twente.
And rather than looking to replace the talented Ruiz, Jol admits he needs to bolster the ranks to take some of the pressure off him.
"He is one of my better players. He's always playing for the team and looking for runners to give that last pass," Jol told The Sun.
"Maybe we need another passer."
Ruiz can play across the midfield or in a more advanced position, possessing the ability to score goals like he did against Reading at the weekend.
But Jol admits he prefers using Ruiz's creative abilities behind the striker, insisting he plays a role that nobody else at the club can.
"The thing is you miss him in midfield and if he's not up front, he's playing too deep," he added.
"That is my dilemma."