That RP build sounds fun! Are you going with the white lab coat and welding goggles?
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I actually didn't know you can get addicted to the Nuka Cola products, until I tried for the "drink every flavor there is" achievement. OK sorry, back to the topic.
I'm not sure yet. My thought process was basically that Nora, being a new mother, had been put on antidepressants and mood stabilizers and was maybe taking some over the counter uppers like mentats. And then spent 200 years with her brain marinating in caffine, adrenaline, and pharmaceuticals.
Now she is physically addicted in a way not even the Vault-Tec cleaner chair can help and she is constantly trying to self medicate back to normal. Before the war she was reasonably intelligent, but after 200 years of marinating in berry mentat she is an absolute amoral savant[10 base INT]...but with no practical knowledge of hard sciences or mechanics [so I wont be leveling crafting skills early], a near sociopath but with a tendency to take the long view
I actually plan on spawning nuka cola[caffine], jet[adrenaline], mentats, calmex[mood stabilizer], and day tripper[antidepressant] in vault 111 and taking all of them until I'm addicted. What I cant decide on is how to split STR, END and CHA and whitch will be my primary second stat. It won't be a vats or stealth build, so the other three Stats are largely irrelevant beyond picking a weapon. I will be taking the Danse Dilemma new elder ending and taking the institute with the MM.
If I go STR with Heavy weapons and PA I'll probably were a labcoat and a super soaker filled with gasoline the rest of the time, and will be adding buffout to the initial addictions.
If I go CHA I'll probably be going full Zero and grabbing the absolute highest defense I can manage and letting my companions deal with the killing, and will be adding booze to the initial addictions.
If I go END I will probably favor radiation and explosions and end up looking favoring CotA gear mixed with super science and techno sorcery [probably with [robot]babys armed with buzz saws] and will be adding morphine, I mean, med-X to the initial addictions.