Armadas

Following are the various types of armada directives available in the game and how to source them

Armada Type	Unc/Rare/Epic	Source
Regular / Territory / Klingon Burial Ship	Uncommon	Alliance Store
Regular / Swarm	Rare	Uncommon Armada Chests
Regular	Epic	Rare Armada Chests
Eclipse	Uncommon / Rare	Outlaw Store
Eclipse	Epic	Eclipse Armada Loot Chest
Borg	Cube / Tactical Cube / Assimilator Cube / Mega Cube	Pre-event Free Gift / event store exchange
Doomsday Fissure	Uncommon / Rare / Epic	Pre-event Free Gift

Federation Armadas are considered Explorers, therefore battleships will perform better against them
Romulan Armadas are considered Battleships, therefore interceptors will perform better against them
Klingon Armadas are considered Interceptors, therefore explorers will perform better against them

Crew setup is very important during armada battles.
Even if you have other stronger officers to crew your ship, it is better to drop them for a more effective crew.
Please refer to the Officer Combinations tab in the Officers page for the list of officer combos for armadas.

Epic Eclipse Armada directives are the easiest to source.
Just launch and defeat uncommon or rare eclipse armadas and the winners' loot chests will provide epic directives.

Although faction ships are look more powerful than the special purpose ships such as the Stella and Vidar, they do not perform better than the special purpose ships when it comes to their specific armadas due to the advantages these ships have.
By design, if your Stella or Vidar have reached maximum levels and sufficient research have been done, 6 Stellas are more than capable of defeating the largest eclipse armadas and similarly 6 Vidars are more than sufficient to defeat the Borg Mega Cubes.

Armada rewards are distributed according to the power of each participating ship in the armada. The more powerful the ship is the bigger the share of the rewards.
Although it is tempting to go after the big armadas, it is sometimes counter productive if you are not powerful enough and if you have to invite big players to help you defeat the armada, you could potentially end up with less rewards.
For uncommon and rare Eclipse armadas, where the credits don't come from the winners loot chest, hitting within your own range can yield more rewards than inviting big guns.
For other armadas, unless you are the launcher, joining armadas where your ship power is dwarfed by the others will only mean a repair bill with not much rewards.

Research. Do your researches that help to minimize damage from armadas and also to increase damage against armadas.

The armada control center(ACC) of the launcher also has impact on the outcome as the higher the ACC, the higher the bonus damage your team can deliver against the armada.