Personally, this is the funnest build I've used while playing on Surivaval difficulty in Fallout 4. It require some strategy and a touch of badassery. Don't forget to wear your hair like a Ronin.
The Perks/Stats I used at level 21:
1 Strength
10 Perception
1 Endurance
3 Charisma
3 Intelligence
10 Agility
4 Luck
1 Awareness
1 Penetrator
3 Toughness
1 Lone Wanderer
2 Gun Nut
3 Gunslinger
2 Action Boy
1 Gun Fu
2 Bloody Mess
1 Mysterious Stranger
Watch me at: / catarann
Follow me at: / catarann