Is there a possibility of making every single S rank working like Ixion?

[FireMage]

Improvements would include blocking Wanderer and Traveler tags from damaging the boss, limiting rewards to the first 24 or so people

None of those would be improvements

[Wolfsbane706]

Sounds awful with the ridiculously high number of sranks needed for the achievements

So it might take a little longer to get the achievement. It'll still be there in the end.

None of those would be improvements

The "lock to first 24 engagers" is a spitball and could probably use adjustment in the numbers department. The "block Wanderers and Travelers" idea on the other hand, keeps hunters restricted to their own server, easing up congestion and allowing others a chance to, y'know, actually log in. There's a whole slew of reasons to visit other servers and DCs but hunts are far and away the most impactful.