So I just completed a run through act 1 trying the builds almost exactly like you suggested. It was crazy effective. Exactly how I wanted to play, where I felt I had creative solutions to each fight.
Problem is that while it can be made to work, it's just not as effective as overspecialization
That is literally true in every video game, except in some hybrid builds straight up DO NOT work.
They work here. They're maybe 'sub optimal', but they WORK.