MTG Salvation

In my cube (which is built for multiplayer and is not powered) I currently have the following 3 drops for red creatures:

• Ball Lightning
  
• Dragon Egg
  
• Feldon of the Third Path
  
• Goblin Rabblemaster
  
• Guttersnipe
  
• Hellfire Mongrel
  
• Hurloon Shaman
  
• Kolaghan Forerunners
  
• Manic Vandal
  
• Viashino Sandstalker
  
• Wall of Lava

I'm not really convinced this is the best selection from my collection and was hoping for some opinion, obviously I could go and buy some new cards but I'd prefer to use what I have first.

So would any of the following be better options that I should switch in?

• Ahn-Crop Crasher
  
• Akki Coalflinger
  
• Arc Runner
  
• Arms Dealer
  
• Blistering Barrier
  
• Bloodrock Cyclops
  
• Boggart Arsonists
  
• Brazen Scourge
  
• Brazen Wolves
  
• Breakneck Rider
  
• Brothers of Fire
  
• Burning Shield Askari
  
• Cave People
  
• Cinder Pyromancer
  
• Cosmic Larva
  
• Dualcaster Mage
  
• Dwarven Thaumaturgist
  
• Earthen Goo
  
• Ember Beast
  
• Embraal Gear-Smasher
  
• Enslaved Scout
  
• Fiery Hellhound
  
• Flamestick Courier
  
• Flaring Flame-Kin
  
• Flowstone Channeler
  
• Flowstone Shambler
  
• Frontline Rebel
  
• Ghirapur Gearcrafter
  
• Gnat Alley Creeper
  
• Goatnapper
  
• Goblin Artillery
  
• Goblin King
  
• Goblin Roughrider
  
• Goblin Ruinblaster
  
• Goblin Sharpshooter
  
• Gore Swine
  
• Grinning Ignus
  
• Hissing Iguanar
  
• Hurloon Wrangler
  
• Inner-Flame Acolyte
  
• Ironclaw Buzzardiers
  
• Jaya Ballard, Task Mage
  
• Kazuul's Toll Collector
  
• Kragma Butcher
  
• Krark-Clan Grunt
  
• Krark-Clan Stoker
  
• Minotaur Sureshot
  
• Mogg Assassin
  
• Orcish Cannoneers
  
• Orcish Farmer
  
• Orcish Mechanics
  
• Orcish Veteran
  
• Pardic Swordsmith
  
• Pitchstone Wall
  
• Prodigal Pyromancer
  
• Qal Sisma Behemoth
  
• Raging Gorilla
  
• Razor Swine
  
• Rockslide Elemental
  
• Ronin Houndmaster
  
• Rummaging Goblin
  
• Sabertooth Alley Cat
  
• Salivating Gremlins
  
• Scalding Salamander
  
• Searing Spear Askari
  
• Sin Prodder
  
• Skirk Commando
  
• Sparkspitter
  
• Spearpoint Oread
  
• Spikeshot Goblin
  
• Spireside Infiltrator
  
• Thunder-Thrash Elder
  
• Tuktuk the Explorer
  
• Uthden Troll
  
• Viashino Bladescout
  
• Viashino Racketeer
  
• Vithian Stinger
  
• Wall of Fire
  
• Whip Sergeant

How many players play in your multiplayer games? Is it a free-for-all type game?

From your collection, I like these a lot better (in that order) than a few you are running:

• Dualcaster Mage
  
• Sin Prodder
  
• Tuktuk the Explorer
  
• Goblin Sharpshooter
  
• Jaya Ballard, Task Mage
  
• Hissing Iguanar

Here are those I would cut :
Ball Lightning: hits one player once. Not enough for MP games
Dragon Egg: working for a 2/2 flyer seems mediocre
Hurloon Shaman: Nice global effect and attack deterrent, but tough to make use of it.
Kolaghan Forerunners: Inconsistent card depending on your board state.
Viashino Sandstalker: Better than Ball Lightning but very mana intensive and 4 damage to one player isn't going to do you a whole lot of good.
Wall of Lava: Doesn't really do anything.

There might also be a few cheap ones you could pick up if you are looking to improve your collection.

It's usually 4-6 players mostly free for all but also 5 point star format.

If there are some cheap improvements I'd definitely be interested to hear them.

Taurean Mauler is a powerful 3 drop that scales well with multiple players.
Alesha, Who Smiles at Death can bring a lot of value. Though depending on where you classify it takes a red or a gold slot
Viashino Heretic as a source of damage and repeatable artifact destruction.
Chandra's Spitfire can do some work if you pack some mass damage spells like Earthquake.

In addition to the excellent suggestions above, other options include:

Hanweir Garrison
Pia Nalaar
Squee, Goblin Nabob

Not sure how these fit in specifically with multiplayer but they're just good 3-drops for cube in general

Fire Ants is a lesser played card that I'd suggest. Definitely play Goblin Sharpshooter, and definitely cut the cards that Miaou suggested. Taurean Mauler is also a great add for multiplayer. Scab-Clan Berserker is a card I've seen on lists, though I've never seen it in play.

Deputized Protester and Enraged Revolutionary are designed for multiplayer, but they're not good.

Squee, Goblin Nabob; not necessarily a "multiplayer" card but in my experience the slower pace of a multiplayer plays into its strengths, it's easier to grind out value from him when you aren't under as much pressure and whilst powerful he doesn't draw too much heat.

From my personal experience (my cube was built for 1-on-1, but regularly is played with 3) Agro suffers heavily in multiplayer, you often end up kingmaker but very rarely win. I would cut any card that is primarily an Agro card.