You have to watch your buggy while it's oversteering to determine what the cause is...
1-If your inside tire is expanding a lot compared to the outside tire, you should look into swapping oils in the front diff
2-If you just seem to have a lack of grip at the front playing with the camber can have a night and day effect, too much rear camber makest the car extremely stable in high speed corners but it takes away some steering the rear end is just planted and refuses to come around in this case you can dial out some rear camber or add some camber at the front .
I hope you find my info usefull.