Trolls:
Casters: eMadrak, Calandra, Borka Kegslayer, GunBjorn, Grim Angus
Beasts: Dire Troll Mauler, Earthborn Dire troll, Troll Axer, Troll Impaler
Units: Fennblades, pyg burrowers, Champions
Unit Attachments/Solos: Fenblade UA, Runebearer, Fell Caller hero, Stone Scribe Chronicler, Jannisa Stonetide
Legion:
Casters: eThangrosh, Saeryn, eLylyth, Bethayne, Absylonia
Beasts: Typhon, shredder, stinger, Carnivean, Ravegore, Seraph, Nephlim Bolt Thrower, Angelius.
Units: Striders, Black Frost Shard, Raptors, Hex Hunters, Swordsmen
Unit Attachments/Solos: shepard, spell martyrs, strider deathstalker, Anyssaa Ryvaal, Strider UA, Bayal
Skorne:
Casters: eMakeda, Xerxis, eMorghoul, Rasheth
Beasts: Molik Karn, Bronzeback Titan, Titan Gladiator, Cyclops Shaman,
Units: Nihilators, praetorian swordsman, Cataphract Cetrati
Unit Attachments/Solos: Void Spirit, praetorian swordsmen UA, Hakaar the Destroyer, Paingiver Master Tormentor
Circle:
Casters: Kromac, Baldur, eKaya, eKrueger,
Beasts: Feral Warpwolf, Pureblood Warpwolf, Wold Warden, Warpwolf Stalker, Gorax, Megalith.
Units: Druids of Orboros, Tharn bloodtrackers, shifting stones, wolves of Orboros
Unit Attachments/Solos: Lord of the Feast, Nuala, Druid UA, wolves UA, Tharn Whitemane
Minions:
Casters: All (there are only 4)
Beasts: Any/all
While beasts and casters are important to a minion player, all other factions can take minion units/solos in their army and are therefore of more importance.
Units: Cylena Raefyll and Nyss Hunters, Bog Trog Ambushers, Gatorman Posse, swamp gobber bellows crew, Farrow Slaughterhousers.
Unit Attachements/Solos: Viktor Pendrake, Saxon Orrik, Lanyssa Ryssyll, Thrullg
Just some basic stuff i thought would be helpful.