The article evaluates the performance of combinational approaches for peak power reduction in Orthogonal Frequency Division Multiplexing (OFDM) system. Here, two intelligent combinations have been presented using constellation extension and scrambling techniques. The principle of these combinational approaches is to use Partial Transmit Sequence (PTS) and Approximate Gradient Project (AGP) schemes simultaneously in an OFDM standards in serial and parallel structure. At the end, simulation results show that these two combined approaches reduce the PAPR as compared to conventional techniques and also maintain the Bit Error Rate (BER) performance of the system especially at low Signal to Noise Ratio (SNR). Moreover, the proposed parallel approach maintains the data rate and reduces the computational complexity in compared to PTS scheme.