I am using this one right now, it's very efficient.
Special : Strength 6 Agi 5 End : 8 Int : 9 Cha : 2 Per : 5 : Luck : 5Īfter that, whatever you want, more criticals and better criticals can be interesting but you must use 2 special training perks to get enough or take implants in new vegas. Guns, Repair, whatever you want (I used speech) The combat shotgun ammo is more common because used by the raiders for the single shotgun and more rarely with the sawed-off shotgun. You can buy one on flak & schrapnel store. I got as soon as level 8 a hunting shotgun from the talon mercs, however the best is still to get the combat shotgun. Only a few builds seems in that context to be viable in Vanilla :
The most powerfull weapons of fallout 3 tend to rely mostly on high damage per second but poor raw damages. A lot of monsters (mirelurk, radscorpions, super mutant, enclave soldiers) have very high damage threshold making them hard to kill with most of weapons of Fallout 3.