I was thinking more, tester intentionally attacks in patterns with say 3 weapons over say 30 min. get X blind parries in that time to qualify. To show that you can recognise attack patterns and parry said weapons with reasonable success.
Its also why the only tough one is for rank 5. the rest are fairly easy but requiring blind parrying to reach 5 would keep the skill standards for the elite ranks high and give players of lower ranks clear skill related goals to work towards, improving the quality of our members overall.
I really thought the idea through.