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Companion Core is a reliable Haste engine within the Friends archetype, offering easy access to speed and efficiency. It's a simple recipe that can result in very powerful scaling.
The shell of the build is quite easy to assemble, but proper navigation is often required in order to see it through to the finish line.
Note: While not all Companion Core builds will feature the Core in the end (or at all), it's still an important piece that helps bridge the pathway for the Friends archetype.
Clawrence and 
Brick Buddy are the backbone of the early to mid game, providing quick access to strong Damage/Shield scaling.
Char Cole is a reasonable scaling alternative in the first few days, but is quite slow and should be replaced ASAP.
Chris Army Knife and 
First Aiden are typically the go-to Small Friends. Haste/Heal is always helps, while Chris benefits from both Damage/Shield scaling.
Micro Dave can be used alongside a full board of Small items, IF you have early Burn skills. However, don't over-invest as this strategy quickly falls off.
Sat-Comm is a great source of income and can occasionally spawn some very useful Friends, including duplicates or ones from other heroes.
Crypto is always worth purchasing if you have the funds and aren't in immediate need of gold. Remember to check its value every hour!
Bomb Squad
Copper Ed
Hammlet
Plasma Grenade
Power Sander
Pulse Rifle
Rocket Launcher
Soldering Gun
WallaceCompanion Core is the primary choice, but 
Launcher Core can be a substitute when it's unavailable.Launcher Core, 
Levitation Pad can grant it Flying so that it can Charge itself.
DJ Circuit Breaker can actually replace both Cores with its board-wide Haste. Its effect is stronger than Companion Core, but does have a slower startup.
Nanobots are quite strong and definitely worth including. If you find another DJ Circuit Breaker, feel free to add the second Nanobot!
Race Carl Charges absurdly fast within DJ Circuit Breaker setups since there's significantly more Haste triggers.
Miss Isles is incredibly efficient at Charging the Core while simultaneously scaling into huge threat. An easy replacement for Clawrence.
Metronome is a great flexible slot-in for Haste support, but do be careful not to include too many passive items.
Mech-Moles can be a surprisingly effective scaler in the mid game as long as you have a reliable amount of controllable Haste.
Static Acceleration is incredible, even if you lack Haste currently).
Schematics and 
Temporal Navigator are optional Economy items if you can spare the Stash space.
BLK-SP1D3R
BLU-B33TL3
GRN-W4SP
RED-F1R3FLY
YLW-M4NT1SIf you happen to be playing Launcher Core, we'd recommend familiarizing yourself with the Launcher Core Build. This gives you more viable options, and another path to follow in case Friends aren't available.
Dooltron and/or 
Robotic Factory are the most powerful and reliable top-end options for Friends builds.Dooltron deals absurd Damage on a deceptively fast clock, while also providing inherent sustain via Shield.Robotic Factory ramps up your entire board with its Multicast, making scaling builds quickly get out of hand.
Bunker is a slightly weaker alternative to Robotic Factory, but still works quite well.
Dino Saddle is also an option, as Dooltron inherently is a Vehicle.
Pierre Conditioner has insane Freeze capabilities and can also provide strong Damage scaling alongside 
Shatter.
Dooltron Mainframe and 
Fiber Optics are optional inclusions for more Charge efficiency. Just ensure you have enough active items to not slow your loop.Dooltron, unless you have Robotic Factory to back them up.
Scrap Metal is a great pickup if you have spare funds to afford it. Even if you can't complete its Quest, it's still useful for the Cooldown Reduction.
3D Printer + 
Hologram Projector can be used alongside DJ Circuit Breaker to create an aggressive multi-Nanobot setup.
