Red death because its already a heavy hitter and the impact of pulse rifle nerf isn't as severe as hand cannons.
Other candidates would be
pocket infinity and plan c:
Possible more accuracy shortrange and to counter people insisting on still using last word and shot package/rangefinder shotguns
bad juju:
Similar to red death, not severe pulse rifle nerf, plus auto rifle like gun with less damage drop off
universal remote:
Possible to not be effected by shotgun debuff. I believe it will be longest range shotgun, again..
hardlight
My personal pick if pulse rifles are hit harder than I predict. Plus the stability increase(with fitted stock it might max stability to 100.) It has a decent magazine and high rof. It has 100 aim assist. Plus tweaked volatile rounds. Most like Will be king auto rifle.
English
-
It's the gun everyone forgets about. They uped base damage on low and medium impact scouts that's the MMT. It was already a beast it will move to the top over red death.
-
Also reduced accuracy for close quarters on scouts to promote long range selective precision shots so mmt may or may not be a good choice
-
They are merging perks that grant stability while also giving a negative stat debuff in another area
-
What could it effect range or mag size still would be king for one and one close to medium ranges only drawback to hardlight would be recoil