There was kinda the same question before by someone, but couldn't answer to that topic and my budget is little bit tougher

Im gonna play with 116ee lvl55 dagger at first, but will be buying ~150ee dagger as soon as i get the juice for it.

Should i try to hoard some dex robes or is it better to go with ee robes with my budget?

I played monk and ninja last reset with low 1xx gear. I found ee robes to be much more fun for solo play. Group might be better to go stat.

Personally i don't get ee robes, the physical defense doesnt really stack very well with high vitality and you're going to need about 100 vitality.
I go 120+ vitality and use dex robes