Do you also think that the default enchantments on the Nightingale Armor suck? And that the already existing mods to improve your armor were too overpowered? Well I did anyway, but because I thought this was the best looking armor in the whole game, I decided to replace the enchantments with some other, better enchantments, especially suitable for thieves. The enchantments are:

Nightingale Boots:
Pickpocket success is 35% better.

Nightingale Gloves:
Lockpicking is 35% easier.

Nightingale Armor:
Carrying capacity increased by 50 points.

Nightingale Hood:
Prices are 20% better.

The enchantments are the same as on the Guild Master's Armor set, but because I like the look of the Nightingale armor, I'd prefer to wear this one.

If you'd rather have an better Nightingale Enchantment mod especially for Assassins, check out my other mod!