There should be a discount type that enables Threshold type discounts with the ability to mix and match the products.

Many retailers would like to offer discounts such as: "Buy 2 or more products, get 30% off".

This is not possible to achieve without using categories/supplementary categories.

The discount will apply for every product bought after 2 item. Not only the 2, 4, 6th product as with current functionality in a mix and match discount with line group 2.