This is a Striker build that I have been using on Xbox to play mainly in Skirmish.
The amount of damage and the ROF from the Alejandro make it difficult for a team to push. Stacks build quick and can build up at long range due to the optimal range of LMGs. Most fights are CQC on console and this type of play style counters it.
I use the M4 for close quarters engagements, you can switch this out with The House if you want. I prefer the versatile range of the M4 personally.
You can play this as a run and gun build, but plays best if you position yourself in cover and lock down lanes with the Cover Shooter talent. You can switch out On the Move for Steady Hands to increase your stability while in cover. I didn't feel it was necessary for me so I chose On the Move for when I eventually had to participate in the chicken dance.