Crown of persistence - Which one? str, int or dex for a mage?

I gonna hit lvl 56 today. And I'm not sure which crown I should take.
I'm a Mage (173 int/105 dex/rest str).
I'm thinking of taking the str crown for more survivability.
Which crown did you choose? And are you happy with that?
Or is the crown just a vanity item?

btw... I know that the crown will break the set bonus, plzzz... we dont need to talk about that.

I would be glad, if I get a fast answer from you.

see you in game, guys!

Mia

IGN: Miafee