My god, ronak123456 JUST started his thread yesterday... maybe he will find a lot better ways to save battery and can lift his "standard settings"...like I did.
I also recommended 0% when I started months ago.
But as you can read in my thread I currently get 7+h of screen-on-time
with 25-30% brightness, auto-sync on, 4 email-accounts syncing every 3-6 h, 9 widgets on 3 homescreens, led working, whatsapp whitelisted, fast performance, .... and with a great "smartphone" usage pattern/ doing more than a normal user does!
So all your arguments are invalid. Just inform yourself better.
And give ronak123456 a chance...jesus... critizising is easy, contribution needs guts!
Ok, will put a link to your thread when I update my thread. Hope it will help you a little.
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My thread about optimizing the battery life of Sony's Xperia Z:
http://forum.xda-developers.com/showthread.php?t=2382712