You can create several discounts, each one attached to a user group
When you say user groups are you referring to the default Joomla groups ? OR special fields within Hika ?
I would be interested in knowing, and tell me if this is what you mean by that:
I will have a subscription based site, these subscriptions are based and work from Joomla's core user management system, but with custom groups.
So in regard to Hika, if a user who is part of say " Subscription Group A " they can get a discount of 10% " Subscription Group B " they can get a discount of 20%
Hika will know BASED on Joomla's core user management system and Their Group ?
Hope explained ok ..