Quote Originally Posted by Mhaeric View Post
I haven't tested extensively, but from what I can tell the game simply prioritizes crit > dhit > det when recommending, all else being equal.

It might also just be as simple as the Neo-Ishgardian comes first in their database.
It is simple but not in the way you think. The Recommended gear system works completely off of ilevel and will always choose the first item it comes to based on where items are in your Armory Chest. If you have something equiped the system will recommend the highest ilevel item that the current job can equip. If there are multiple equipable items of the same ilevel the first item found from right to left top to bottom will be suggested.