Legendary Skill Groups, Comboes, and Lineups

Skills only affecting the hero them self:

• Dark Dracul
• Pixie Queen
• Roller Warrior
• Cosmic Elf
• Skeleton King
• Snap Dragon
• Unstable Understudy
• Wild Satyr
• Dragon Lady
• Dwarven Archer
• Frost Giant
• Rot Beard
• Magic Dragon
• Groovy Druid
• Polemaster
• Rabid Dragon

Skills affecting allies (and themselves)

• Bardbarian
• Ninja Dwarf
• Medusa
• Electroyeti
• Dark Horse
• Orc Monk
• Unicorgi
• Hydra
• Brozerker
• Aquatic Man
• Moon Drake
• Shadow Assassin
• Dust Devil
• Zombie Squire
• Catapult Knight

Skills affecting the enemies (or debuffing)

• Electroyeti
• Shadow Assassin
• Dust Devil
• Catapult Knight
• Frost Giant
• Aquatic Man
• Spirit Wolf
• Bone Dragon

Legendary Skills which affect enemies/allies are great combo skillers. There's a different team that works with every skill, and below are some of my favorites that I've dropped out of my head.

Legendary Skill Comboers

• Electricity Crew: Electroyeti, Rabid Dragon, Cyclops Shaman, Ancient Idol        (Recommended Lineups:
• Yeti, Shaman, Hydra, Ancient Idol, Mogul/Tank (Electricity DoT)
• Yeti, Rabid Dragon, Revenant, Bardbarian, Shaman (Electrical Basic Bash)
• DoT Crew: Hydra, Dark Dracul, Cyclops Shaman, Ambush Spider, Plaque Mogul, Bone Dragon, Snap, Frost Giant, Vulture Dragon, Dust Devil, Kaiju, Ancient Idol.            (Recommended Lineups: 
• Hydra, Dracul, Cyclops, Mogul, Frost/Idol/Tank (Pure DoT Damage)
• Hydra, Cyclops, Yeti, Idol, Mogul/Tank (Electricity DoT)
• Hydra, Mogul, Snap, Bone, Spider/Vulture (Toxic DoT)
• Hydra, Banshee, Frost Giant, Spider, Ancient Idol/Bone (Slow, Inevitable DoT Death)
• Stun Crew: Dust Devil, Dark Horse, Skeleton King, Master Thief, Shaman, Genie (Only death), Spikey Dragon, Wild Satyr, Savage Cutie, Roller Warrior, Crimson Witch, Rot Beard, Polemaster, Dragon Lady, Shadow Assassin, Magic Dragon, Ancient Idol, Zombie Squire, Kraken Lord, Medusa?                                                                              (Recommended Lineups:
• Dust Devil, Ancient Idol, Spikey Dragon, Crimson Witch, Dragon Lady (Solid Stuns)
• Dust Devil, Shadow Assassin, Wild Satyr, Rot Beard, Pole Master (Piercing Stuns)
• Dust Devil, Skeleton King, Wild Satyr, Dark Horse, Rot Beard (Wall/Damage Stunners)
• Dust Devil, Medusa, Shaman, Rot Beard, Genie (Forever Stun, Massive Damage)
• Piercing Crew: Shadow Assassin, Dark Dracul, Raging Revenant, Plant Soul, Spirit Wolf, Hydra, Spikey Dragon, Wild Satyr, Manicure, Mogul, Snap Dragon, Brozerker, Frost Giant, Rot Beard, Polemaster, Silent Spirit, Groovy Druid, Dwarven Archer, Trio    (Recommended Lineups:
• Shadow Assassin, Dark Dracul, Manicure, Rot Beard, Silent Spirit/Tank (AoE Piercing Death)
• Shadow Assassin, Dwarven Archer, Raging Revenant, Rot Beard, Silent Spirit/Plant/Tank (Basic Piercing Massacre)
• Shadow Assassin, Mogul, Hydra, Snap Dragon, Dwarven Archer/Other (Toxic Piercing)
• Shadow Assassin, Brozerker, Frost Giant, Wild Satyr, Plant Soul (Piercing Wall)
• Water Crew: Aquatic Man, Rot Beard, Doppleganger, Wyrm, Frost Giant, Kraken    (Recommended Lineups:
• Aquatic Man, Rot Beard, Kraken Lord, Frost Giant, Tank (Catch n' Kill)
• Aquatic Man, Frost Giant, Water Wyrm, Kraken Lord, Tank (Water Wall)
• Aquatic Man, Doppleganger, Rot Beard, Tank, Other (Mixed Water)
• Disable Crew: Spirit Wolf, Medusa, Skeleton King, Raging Revenant, Dark Horse, Master Thief, Shaman, Golden Genie, Spikey Dragon, Wild Satyr, Savage Cutie, Roller, Catapult Knight, Crimson Witch, Rot Beard, Polemaster, Dragon Lady, Shadow Assassin, Magic Dragon, Ancient Idol, Zombie Squire, Kraken Lord, Plague Mogul, Understudy, Moon Drake, Wee Witch, Cosmic Elf, Centaur, Banshee, Dust Devil            (Recommended Lineups:
• Spirit Wolf, Ancient Idol, Medusa, Crimson Witch, Cosmic (Forever Immobile)
• Spirit Wolf, Cosmic Elf, Wee Witch, Centaur, Banshee (Silence!)
• Spirit Wolf, Shaman, Moon Drake, Bone Dragon, Cosmic Elf (Energy Gain/Removal)
• Spirit Wolf, Raging Revenant, Dark Horse,Skeleton King, Banshee (Slow Deathly Wall)
• Spirit Wolf, Medusa, Crimson Witch, Dragon Lady/Dark Horse, Dust Devil (Stun Crew 2.0)
• Shielded Crew: Brozerker, Dark Horse, Orc Monk                                                        (Recommended Lineups:
• Bro, Horse, Orc, Two Damagers
• Bro, Horse, Orc, Damager, Healer
• Bro, Horse, Orc, Damager, Control

That's all folks. Please note that Shadow Assassin's legendary only procs whenever the enemies are below 50%.

Water Crew and Shielded Crew have very few members, but they still work well enough.