Around what chapter does the guy from the war cemetery show up? I want to make sure when he does I have enough XP. I will probably grind XP from a Skirmish until I do. How much do you need? If you save after a chapters ends can you make sure he always gives you a new one by reloading?
On a side note, does any of the DLC offer special weapons or commands? If so whch one is best? I am a very anal gamer, its a condition that applies to my entire life.