hello
i want to program the following shopping cart rule (amasty plug-in), but I don't manage to get it done... 
for a certain range of categories I want to give the following reductions
1 product in basket: 5% discount
2 products in basket: 10% for the most expensive - 5% for the other one
3 or more products in basket: 15% for the most expensive - 10% for the second most expensive - 5% for the third most expensive
Probably you need several different pricing rules, but I don't know how to do it....
Anyone with a solution? 
Best Regards
jan