This is a condition almost impossible to not satisfy. Either (or both) strength and endurance must be at least 30. The other requirements include the favored skills that you appear to meet, and a minimum attribute threshold that must be satisfied. If you have not performed any quests for House Redoran your reputation is -5 and a minimum value of 0 is required to join. Declining the quest reduces the player's reputation by 5. PrinceShroob's explanation seems the most likely, but you would know if you refused to help Sason. It is above all of the new entries added by Pax Redoran under the topic 'join House Redoran' so it does not appear to be an issue with the mod. If that is the response you are hearing from Neminda it is the official entry that displays when the player does not satisfy the requirements for membership.
Unfortunately, you do not meet our requirements.'
'House Redoran only accepts the best and more honorable warriors.
