4x4 Splits help

[Akash Rupela]

My 4x4 splits are like follows( average)
Centers- 16 seconds (varies from 10 to 25)
Edges 42 seconds (varies from 30 to 60)
Post Redux 27 seconds( varies from 17 to 35) .

Obviously, these are not comparable splits, i use 3-2-2-2-3 for Edges. (do A u Turn, solve 3 edges, then solve others 2 at time normally).
What according to you would be a good split ratio
Also, what would be an effective way to achieve it quickly, I m very bad at tracking pieces. And While inserting edges in the E ring, If the edge is on U face, its quite convenient. If its on D face, I will do a x2 or z2 and then insert it. Should i practice inserting them without rotations? What else should i do?
All help would be appreciated
Akash

P.S (I dont know if there is a thread on this, i found some of them, but none really answered my question)

 

[zipper]

Hey !
So i took some split times from solving 4x4. First 5 solves of the day. Which stage should have more practising?
My 4x4x4 PB's-->
Single TOP8:
1) 52.54 ; 2) 53.16 ; 3) 53.73 ; 4) 53.79 ; 5) 54.40 ; 6) 54.58 ; 7) 54.65 ; 8) 54.77
Average 3/5 : 00:57.00
Average 10/12: 01:00.67
Normally my average is between 1:07....1:02 (Current Avg161: 1:07.12)