M14 red combo

[Vindog]

 {Ogre Battledriver}+  {Young Pyromancer} for 3/1's that have haste.

[Mattao19]

{Ogre Battledriver}+  {Young Pyromancer} for 3/1's that have haste.

I know it's not M14 or Mono Red but  {Assemble the Legion} is also awesome with this

[Agrus Kos, Enforcer of Truth]

Throw in Purphoros and: Whenever another creature enters the battlefield under your control, Purphoros deals 2 damage to each opponent.

[Jdogtoocool]

Go ahead and add a  {Legion Loyalist} for funsies

[Caininite]

 And a {Goblin Rally} for kicks.