Hmmn, that might not be such a good idea.
According to that build, you'd get 100 DEX by level 70, and that is not very good.
Go 1/4 DEX/STR if you want, but max your DEX at most at 80.
Then, when you hit 3rd job, you can decide where to go from there [moving onto 100 DEX or staying with your 2nd Job DEX Cap]