Farm build without epiphany recommendations:
If you have hirling, get fortune 20 on both of them.
Get at least 1× 225% luck on both characters and some luck nature or epic affix on pet/gear.
You'll easily get 650% luck (850% if you use Fortunate ascension perk).
For main character, you will probably use Eternalized and Crystalline found from floor 350+ . If you are new at finding mythstones, Mythical will also help. The rest of the set affixes can be for DMG output.
Well the first rogue main will also have 1× Gold find crystal affix whilst the rest of the gold find is taken care of by fortune 20 on both characters and mythic 3. Easily 650% gold find (850% from perk).
Hirling is entirely DMG output except the 1× lunch Affix crystal and some item drops affixes from Mythstone or 2 legend affix or 3 item drop per character.
That's 200% item drops (but it appears as 300% when you wear hirling and that 300% is very real and very worth it).
Slots taken on first character: 2× crystal affix slot for 1 Luck and 1 Gold Find. Then either 6 slots for item drops fortune Mythstone or 2 slots taken for legend item drops. Fortune 20 hero points obviously.
Also 2 slots taken for Eternalized and Crystalline set. If you win for Anything so, 3 set slots. Well if you had Epiphany, usually 3 set slots anyways but this idea is if you don't have Epiphany.
Thats around 7 to 11 slots taken out of 36 (if i not include the pet).
The rest of the slots can be used for DMG like glasscannon, wd% , ed% , possible Barbarian legend affi; Mythics like Energy/Fury or Alchemy or even Discordance; along with chest mythics like Exposed, Ruptured or Brutal; Weapon mythic like cosmic orb for example ; and sets like Demonic (which is similar to relentless but far more DMG), Momentum if you have high move speed affixes and skills, Living Force for rogue projectiles and sets like Frozen for Ice Explosions or Plagued for Poison Cloud high DMG.
Possible crystal affixes as well as farm affixes could be Crit DMG, crit chance and crushing blow possibly.
Rogue skills you could use: Flintlock farm build (plenty of those on forums), chakram/whirling blades, dagger blinkstriker or even a Bow build. Bow build is also very promising, especially with the DMG per pierced on hero points (chakram skills have that too).
Although since you will use crystalline and Eternalized, the options are Flintlock build with Immortal Flintlock or Dagger Blinkstrike build.
For hirling: she will have 1× crystal luck but the rest crystal affix are DMG. 2 slots or 6 slots taken for item drops (the 2 slots is if it's 2× 50% item drops). Total slots taken for farming is only 3 or 7 slots.
The rest of the slots can be for DMG and this hirling could be rogue or any class you choose and the hirling can attack with whatever skill they want without weapon restrictions due to Crystalline or Eternalized weapon.