Isolation and optimization of the selfish node in the MANET network using ns2

My project is about detaction and improving the selfish node in MANET. The detaction of the selfish node is done through the energy equation and the communication ratio equation . I have already finished this step. What I'm still stuck in is isolating the selfish nodes from the routing table and replacing it with other nodes. In addition to minor adjustments to the window size tcp ) could any one please help me with that