Space Marine Scouts are excellent for controlling territory and guarding more expensive units against assault.
Faction: Space Marines
Space Marine Librarian
The Librarian can be attached to a Space Marine infantry formation. He has a powerful psychic attack, and also adds leadership benefits to the formation he commands.
Devastators
Devastator Marines carry shoulder mounted missile launchers capable of destroying infantry and vehicles alike. A popular method of deploying them is via Thunderhawk Gunship, with a Dreadnought to provide cover and extra firepower.
Space Marine Captain
A space Marine Captain brings additional leadership qualities to Marine Tactical, Devastator, and Assault formations. In Epic Armageddon, a Captain can call on nearby formations to join him in a combined assault.
Space Marine Chaplian
A Space Marine Chaplain is an inspiring character, who drives those around him to assault with greater zeal and ferocity. He can be the difference between winning or losing and engadgement.
Warlord Titan
The Warlord Titan is a massive war engine, capable of laying waste to entire formations. With a full complement of Void Shields and high damage capacity, destroying one can prove a tall order. However, they are very expensive, and including one in an army will mean sacrificing tactical flexibility.
Assault Marines
Assault Marines are highly mobile close combat shock troops. They can be used in effective flanking attacks, jumping over terrain that would slow down regular infantry and vehicles.