I'm trying to create a promotion where a customer gets a 10% discount if they buy 6 units of 6 different designs. This is out of 250 possible designs. With the promotion rules in standard Magento limited to conditional blocks I am having a hard time figuring this one out.
As it is, I would need to set an overall "any" condition and then below that check all of the possible combinations of 6 using "all" conditions. The problem with this is that in a pool of 250 total items there are 319195444750 possible combinations of 6 (250choose6).
It would not be possible for me to click all of those into the condition section of the promotion.
Is there an extension that might help? Is there a way to get "if 6 of the following are true" instead of "if all/any of the following are true"? That would bring it down to 250 things to check instead of 319195444750.