Players can assign their retainers ventures, you must first assign them a class and equip them with a weapon. Purchase weapons at starting cities that are home to the class you are choosing.
Retainers can be set to any of the Discples of War, Disciples of Magic and Gathering classes. Assigned class determines what items they can collect.

Classes your character have not unlocked cannot be assigned to retainers.

A retainer's class can be changed at any time. Will reset to one.


Unlocking:

An Ill-conceived Venture
Limsa Lominsa Lower Decks (X:9 Y:11) -Troubled Adventurer
New Gridania (X:11 Y:12)- Troubled Adventurer
Ul'dah - Steps of Nald (X:9 Y:8) -Troubled Adventurer

Gear

Retainers can be equipped with gear befitting their assigned class and level, which will in turn affect items procured on their venture. Items will be procured in increased quantities by increasing either average item level for Disciples of War and Magic, or gathering rating for Disciples of the Land. Moreover, for retainers set as Disciples of the Land, increasing perception will result in a higher likelihood of obtaining high-quality items.

Gear equipped by a retainer will be bound upon completion of a retainer venture. However, bound items can still be exchanged and used by both players and their retainers.

Gear durability will not be affected by retainer ventures.
Spiritbond rating will not be affected by retainer ventures.

TRICK!!!! you can actually buy extra unique untradable mainhand gathering tools (blue background tools, obtained from guild masters by completing lvl 50 class quests) from the Calamity Salvager. E.g. If you're a miner, and you own a Mammon (http://ffxiv.gamerescape.com/wiki/Mammon), you can give the Mammon to your retainer, and then buy a new one for yourself from the Calamity Salvager.

Types of Retainer Ventures

Retainers may undertake one of several types of ventures. Depending on the type of venture, retainers will be tasked with obtaining a specified item, or left to freely explore the world to obtain items as they see fit.
Hunting

Hunting.

The following ventures will task your retainer with procuring a specified item.

Disciples of War and Magic - Hunting (leather and other mob dropped items)
Miner - Mining
Botanist - Botany
Fisher - Fishing

IMPORTANT!!! Keep in mind that both hunter retainers and gathering retainers can only be 5 levels below yourself, except when you're lvl 50. When you're lvl 50, they can reach lvl 50. Due to this reason, it is of utmost importance that you set your hunter retainer same as your main DoW/DoM, ideally a class at level 50. For the gathering retainer, set it to the same class as your strongest DoL. DO NOT try to diversify by setting your retainer to a Botanist if you're a Miner. It won't work!

For hunter retainers (DoW/DoM), their average ilevel matters a lot. I recommend you making them at least avg ilvl 70+ when she/he reaches lvl 50. For Miner/Botanist, their ilvls matter before lvl 50, but not after level 50. When Miner/Bot retainer is lvl 50, GATHERING is what matters.


Field Exploration

See: Field Exploration.
The following exploration ventures will allow your retainer to freely explore the world, procuring items as they see fit. Although these ventures require more time to complete, they yield far greater experience, and also allow retainers to procure more obscure items such as Allagan bronze and silver pieces.

Disciples of War and Magic - Field Exploration
Miner - Highland Exploration
Botanist - Woodland Exploration
Fisher - Waterside Exploration

Although retainers will procure items randomly, higher-level retainers may procure items, minions, and crafting materials unique to exploration ventures.

Quick Exploration

Upon reaching level 10, retainers can undertake quick exploration ventures. Retainers assigned to quick exploration will always come back with a single item, which will remain unknown until the venture is completed. The amount of experience earned will vary depending on the item found.

There are no items unique to quick exploration ventures.

Assigning a Venture


Players can assign a venture to their retainers by selecting Assign Venture from the retainer interface. Assigning a venture requires payment with a unique currency named ventures, which can be acquired through the exchange of company seals, fulfilling leve objectives, or completing beast tribe quests.

Players can still summon their retainers and place items for sale on the market while a venture is in progress.

Completing Ventures

When completed, your retainer's venture report will be updated in the retainer interface, allowing you to collect the spoils of their venture. Retainers will receive experience points upon completion of ventures, increasing their level to a maximum of 50. The number of available ventures will increase as your retainer advances in level.