Lightbulb Battery problem and Downgrading

Hello devs, I have rooted my International 4.3 and totally removed KNOX..
1*but ever since I 'rooted' my 4.3, my battery drain terribly doubled(all know that battery problm due to 4.1-->4.3)
2*I have disabled (many non- 'com.')system apps and since 4.1 my flash counter is1and status:custom!
3*my main problem is Battery drain, 20min of browsing till now took 3% but now takes 6-7...
4*Any SOLUTION?
5*Or I downgrade to 4.1.2 by flashing old stock rom and recover IMEI by Dr.Ketan MultiTools?
Plz help me friends, Thnx in advance