I want that Ace of Spades but I'm really not looking forward to this quest - namely the 5 invasion kills in Gambit. I want to try out the mode (I haven't yet), but as a solo player, I feel this will be an exercise in frustration.
I mainly play solo and basically got my 5 invader kills within two games of Gambit by using the Crimson handcannon. The 3 round burst takes down the invader overshield very quickly. Hope this helps. Good luck,
you can get it done!