function guaranteedPost(endpointId, wallPost, attempts){
  var attempts = attempts || 0
  return graph.postAsync(endpointId + '/feed', wallPost)
  .then(function(response){
    return response
  })
  .catch(function(error){
    if(error.message != errorMessage){
      return Promise.reject(error.message)
    }
    console.log('Retry attempt #: ' + attempts)
    if(attempts == 5){
      return Promise.reject('Too many errors')
    }
    // console.log(error)
    return Promise.delay(5000).then(function(){
      return guaranteedPost(endpointId, wallPost, attempts + 1)
    })
  });
}

function guaranteedPost(endpointId, wallPost, attempts){
  var attempts = attempts || 0
  return graph.postAsync(endpointId + '/feed', wallPost)
  .then(function(response){
    return response
  })
  .catch(function(error){
    if(error.message != errorMessage){
      return Promise.reject(error.message)
    }
    console.log('Retry attempt #: ' + attempts)
    else if(attempts == 5){ //BLOWS UP
      return Promise.reject('Too many errors')
    }
    // console.log(error)
    return Promise.delay(5000).then(function(){
      return guaranteedPost(endpointId, wallPost, attempts + 1)
    })
  });
}

else if(attempts == 5){
    ^^^^
SyntaxError: Unexpected token else

console.log('Retry attempt #: ' + attempts)

console.log('Retry attempt #: ' + attempts)