Hello Mariano,
I am sorry for the late reply.
If I understand you correctly, you want to install EasyBlog AUP rules in EasyDiscuss isn't? EasyBlog AUP rules are only for Alpha User Point (AUP) component. However, you can install EasyBlog point rules in EasyDiscuss. Here I have attached to you a fix easyblog_easydiscuss_point_rules.zip, extract it and install in your EasyDiscuss. To install this, you need to go to Joomla > Components > EasyDiscuss > Points > Manage rules > New rule > Install. Please give it a try and see if this fix your issue. If you have anymore question, please don't hesitate to ask us.
Hope this will help.
Thanks.