it is very simple equation without army support it would be hard for PMLN to win even half the seat of what they have won in last election. Without Pakistan Army NS is Zero
What are you implying. Either Pakistan army is very popular in Pakistan or either army is pulling the strings and politician can only come to power by collaborating with army in their manupilations and misdeeds. Although one can gain some short term benefits by taking this route but to make any long term roots in public is impossible like this and the example of Pervaiz Elahi is in front of you.
Please do not forget that Pervaiz Musharraf inspite being the army chief became a lame dog and eventually had to go in a rather disgraceful manner.
Don't be so sure about the seats. Please don't forget the fate of Q league. Don't forget stalwarts like Hamayun Akhtar got less than 3000 votes during the last election. Media and Public opinion is the eventual source of power for any politician and Mr. Zardari has proven that he might be a shrewd manupilator but he is far from being a politician. His wife was a different story as she always had a pulse on public mood and her power source was eventually the public. I predict Mr. Zardari's career as a politician is going to be very short one and a very unpopular one as well, and his fate will not be very different to Musharraf and Ziaulhaq.
As far as Sharif brothers are concerned Mr. Zardari has turned them in to a monster. Do you think his team headed by Salman Taseer will be able to challenge Sharif's in Punjab in the next elections. Mr. Zardari is just walking in to army's trap who are conspiring to malign the politicians in Pakistan to continue their grip on power.
Please don't forget that lawyers movement has created enough awareness in Pakistan and media has become a very important player in mobilising public opinion. Musharraf underestimated the power of public/media and did a big mistake. Zardari is doing the same.