Well in my experience I have found that no matter what you choose you will always think other builds seem better. I recomend dual axes but if you're going with 2h sword and sword/shield then I would advise you to stick with 2h sword only untill you reach 60+. I dont actually know when the best time to change is but I know its higher than 60.

maybe swap at level 60 when you get your level 60 weapon.
Ok so, 2hsword to 60 and then hybrid build from then on, if you wanna wait till you're a higher level it couldn't hurt!