Timur's Lash is very, very good. Crowd Control allows you to chain kills with 2HKO headshot kills and Outlaw allows you to reload extremely quickly while doing so, plus Perfect Balance makes it easier to land consecutive headshots. All very useful perks. Also has Field Scout and Explosive Rounds, which are both nice in PvE. Perun's Fire is pretty good. Stability has a larger effect when ADS than when hip firing but it's still a good all around roll. Jolder's Hammer is kind of complicated. If you go with Field Scout then Counterbalance alone won't be enough to compensate for the Stability loss of not having Perfect Balance. You should use a ballistics that increases Stability, like CQB Ballistics or Smart Drift Control. Feeding Frenzy isn't bad at all but it's somewhat redundant when you already have Field Scout, as 50 rounds a magazine is already enough to go on a Relentless 10-kill streak pretty easily without reloading. I'm not sure how Heavy Ammo+ and Field Scout interact after Patch 1.0.3, so I don't know if they stack to give you more ammo per Heavy ammo crate or not. Either way, it's a good roll so long as you have a barrel choice that adds a lot of Stability.