well thanks, but i'm preety sure that mercantile and acrobatics are useless
You do realize that the character levels up by getting 10 skill-ups in your majors?
The build that Ramara gave you is a very good build to slow down your levelling. Many, many Oblivion players use skills like Marksman, Speechcraft, Acrobatics, Alteration, Mysticism, and the oppsite armor to the one they wear because they deliberately want to slow down their levelling.
These days I almost never use a 'jack of all trades' character. The main reason is actually the Abomb bug. Unfortunately Oblivion starts to have a 'slow down of animation' around 200 - 300 hours into a character. Not everybody encounters it, but it is common. And unless you are on PC there is very little you can do about it. A hybrid build for me would last me 500 hours of gaming, something that will most likely encounter the Abomb.
It is better to build characters that do bits and pieces of all the countless quests. Unless you are planing to have the game finished in 100 hours, of course.