i can bowl a good leg spinner..can vary pace..can bowl an off spinner with the same leg spinning action...but i don't have idea about other varieties of leg spin like googly, zooter and others... can anyone help?
Not everyone can bowl the googly. It's something that comes naturally. You need flexible wrists. Regardless, somethings that can improve it are to get your arm as high as possible and a strong follow through in your action. Try to put maximum revs on the ball and really flick that wrist.
The zooter can't be explained in words but it can be learned by everyone. There's a Warne video on youtube explaining how it is bowled. The rest is up to how much you practice.
You don't need a thousand variations to become a good legspinner. What you need is a stock legspinner which you can land on the same spot 9/10 times and a zooter/slider/flipper(a delivery that goes straight on).
The rest of the trick is beating batsman with dip and flight. Vary your lengths slightly, slip in a faster one or flight the ball more and make it dip by putting extra revs to drag the batsman forward. It's as much a mental battle as it is physical.
Alter your field setup just to get the batsman thinking, it doesn't have to change completely. Just move one fielder and open up a gap for the batsman to hit. Analyze the batsman. What are his weak points and strong points, where does he struggle placing the ball, that's where you leave a gap open and force him to play there.
Does he use his feet or is he slow footed and likes to camp on the backfoot. If it's the latter then you can afford to flight the ball more to drag him forward, slowly pull your lengths back as if you've got him on a string.
If he uses his feet well and agile, then you increase your pace slightly and bowl fuller. Vary your lines more instead of your length. If he uses his feet a lot then he will most likely play in front of the wicket so that's where you bowl a wider one or slide one behind as he comes out of the crease. You won't need many fielders behind him so you can afford to pack the field in front him of him.
Batsmen who're both good off the frontfoot and backfoot are elite players of spin. That's when it becomes a mental battle more than a physical one. In that case you stick to consistency and look for a drop in concentration. If he's targeting certain areas then alter your field setups to force him to play somewhere else. It just takes one ball and whoever wins the mental battle will win the game.