Sample farming?

[grimphoenix]

Heya, I just want to max out my perks, being less strong feels bad especially playing nightmare or going for super eggs.
currently from the information I can find (there isnt a lot I have seen) the best way to farm the vitriol samples is to set game difficulty to easy (not beginner because you want to be able to max your weapons) and try to go as many rounds as possible. is this accurate?
I am also trying to figure out what weapons/maps are best for farming, assuming the guide I found was accurate that you get a highest level sample every 5 rounds after 25 the ideal location would be somewhere you can just camp and fire down a hallway, but I am not totally sure what an ideal spot for this would be.
my current best strat has been to go to lavernick because it has less bosses and easy events, and just kite enemies in the main town with the thunderbolt. not sure if this is actually good though, or if I should go someplace else and use a different weapon.

[Profile Name]

This is accurate. Chuck it on easy and just keep upgrading your gear, dont do the quests/story.
Round 25 you get your first Advanced orb. You then get one every 5 rounds after.

I often grind to like round 35 before I get bored. Its a good game to grind while watching YouTube or something.

[Jay Ren]

Was able to go for a super long time as a 2 man in the main round room in he first map using a pair of the super egg weapons. (on hard)

It having the thunderbolt was also a huge help before we unlocked the Super Egg Weapon.

The other map we did well in was the 4th.... just because of the Joseph HMG. I think we hung out in the room you buy it in.

Other maps/areas with a Lucky HMG and that penitration chance miracle might work better, but we never got that.

The big TLDR would be: Get good gun, Stay near ammo. Nearby teleporters are nice.
Boss rooms are often /very/ nice.