Oblivion was a fun game but the leveling was tedious as hell. I'd always max out speed first merely because it was the most annoying stat to raise at high levels, so by around level 15 or so, I'd have 100 speed and could outrun pretty much anything.
It was quite a hassel leveling up in oblivion, due to only having to level up your major skills. I beat alot of the game without even reaching level 10 because of that. According to the wiki Umaril was supposed to be hard to kill but he wasnt.