So at last i am sub 1min now and normally my avg is b.w 52-57sec . Now i feel that i am still slow so what more can i do to improve my time? i use f2l+2look oll and pll
Get better with the method you know.
Practice look ahead and get your recognition time for algorithms down.
Usually a lot of time is spent on F2L, if you are able to cut that down it'll be easier.
It's pretty easy to average sub-30 with what you know, so you should shoot for that.
Just practice. At 5x seconds average all you really need to do is solve over and over. Look ahead is pointless when you're still not comfortable with F2L.
No need for lookahead as people have said. Instead, get comfortable with recognizing cases, and feel free to solve each pair in bursts.
Usually, slow/smooth is better than bursts with pauses, but if you're aiming for sub 30 (which I think you should), then it's more important that you can execute the cases via muscle memory.
It's where you don't even need to think about the algorithm, you see the case and you just perform it without thinking about it. Usually happens only after you are very comfortable with an algorithm.