This post ends up on page 6 or 7, so noone will ever read it, but:
I bloody HATE THE CLAYMORE
It's the WORST WEAPON IN THE GAME!
After doing the Claymore points for the shotgun challenge, my brain had been rewired, and I was no longer able to use any other gun. I found myself reloading + reload cancelling the Talon or the Wraith after every shot, getting absolutely nowhere.
Also, the Claymore absolutely requires exactly these two attachments: smart choke and ammo extension. Yes, really. Without either of those, the weapon is maimed. Now, where can I put my high velocity barrel and omni blade? Oh, I can't. Well, that means it also requires exactly this ammo: armor piercing. You won't make much use of powers because of the weight, so it requires exactly one kind of character: a no-cooldown weapon build. Ok, when you do exactly this, you can get a high rate of fire with high impact hits, and top the score by two or three shotting brutes.
Having to play in such a narrowly constrained way feels like putting both my legs in the same trouser leg.
tl;dr -> Wraith