The problem with making an item like Kridershot extremely rare is that the game is effectively locking a playstyle and making it only available to a small group of players. Making the item have random stat rolls worsens the situation. It should be either a very rare drop with very little roll variations or a common leg drop with highly variable rolls. Even if I do find a regular Krider now, it probably wouldn't be as effective as my ancient Buriza which is quite frustrating.