with the stats below am i ready for the last fight of fallout 2

hp 207
sequeence 21
gauss pistol (560 rounds)
yk2000 plasma rifle (600 rounds)
yk2000 pistol (407 rounds)
.477 pistol - that cut up sniper pistol (370 rounds)
177 stimpacks
27 superstimpacks
18 psycho
53 jet
8 jet antidote

and another question what happens to gorris after the fallout

Yeah, you can probably manage it. :shrug:

Goris? Dunno, but he's the last of the intelligent Deathclaws, thank god.

Depending on what your character can do, you could only use the Gauss Pistol to kill Horrigan. And if you do really well, you could take him down with less than five shots.