I did Marksman and Berserk on HNTR, they are really not too hard. Compared to HMP. Traits make a lot of difference. I recommend Sharpshooter and Vampire respectively.
With Marksman you have it easy early, thanks to huge SoG bonuses.
With Berserk it is somewhat hard at first. But if you do a lot of door camping it's not imposible. Use that "run" button for waiting, I moved it from "," to "insert" (number keyboard zero) for easy access. It will skip lots of turns, but will stop as soon as you see enemy.
And later you get guaranteed good weapon progression (knife, chainsaw and spear/scythe) that let you kill any non-boss under a second. Bossess - under five seconds.