DJDAN
If I know right U-skills works on conceptual level right? If so Runemaster skill indeed replicate it. BUT MC himself will not have it it us rune after all. Difference is like having fire-enchanted sword and having ability to manipulate fire. Or are you going to inscribe Rune on his soul to make make-shift skills? Just suggestion but it will be good idia to not be entirely reliant on system of tensura world because in my opinion it is wise to be independent from something like that.