New Delhi, Chief Economic Advisor V Anantha Nageswaran on Saturday said India needs to create strategic buffers in the face of the "most difficult" energy shock that the country is facing amid the West Asia crisis. Nageswaran also said the rising prices of fertiliser and petroleum products globally due to the crisis will make it challenging to achieve the 4.3 per cent fiscal deficit target for the current fiscal, while below normal monsoon and pass-through of higher energy prices could lead to "potential inflation spike".