Yes, I hadn't really noticed that before, but there does seem to be a different logic (or no real logic) applied to some of the characters. My namesake Hurin for example is level 100 with a 275 OB (his stats are 106 St, 102 Ag, +75 axe), but the Elf Angrod (105 St and 104 Ag, +50 flail), at level 95, has a 395 OB. So despite having better stats/items and 5 more levels, Hurin, whom Tolkien himself described as the greatest of the warriors of mortal men, finds himself more than 100 OB behind.
Well, as you wrote yourself, "the greatest of the warriors of
mortal men", so I guess you can deduce then that an elf would top him, even with less levels and lower stats. It's the pointy ears, you see?
+275 OB, with 106 St, 102 Ag and a +75 axe? Ok,
mayhap my NPC with +285 OB, with 101 St, 101 Ag and +25 double-axe is
slightly powerful.
That being said, 106 St, 102 Ag gives +47 (St/St/Ag = +53/+53/+35) stat bonus, level 100 gives +140 (+3 x 20 +1 x 80) bonus level, for a total of +262 for the stats, level and weapon alone. So Hurin only has
three ranks in his weapon?