Redknapp will not try to merely hold onto the 1-0 first leg advantage his side achieved in the San Siro.
The return of 12-goal leading scorer Van der Vaart and Bale, who has been on target 11 times, will only add to his firepower.
Bale actually made his comeback during the final quarter of Sunday's 3-3 draw at Wolves after six weeks on the sidelines with a back injury. Van der Vaart is making good progress in his recovery from a calf problem.
Redknapp said: "I think we've got enough to hurt Milan at home. We'll be positive. We will play an attacking team. We'll play (Aaron) Lennon and probably Gareth Bale and have a go.
"Peter Crouch has had a great European campaign as well. And Van der Vaart has a good chance for Wednesday, I hope he will be fit."
Source: PA
Source: PA