When to play eternal embers?

Up front I’ll say I’ve played it through like 3 times, and frankly didn’t have much good to say about it, so haven’t played it in years. Thought I’d try it again!

I know it requires level 70 and plays at legendary level, but this pertains to EE’s difficulty level versus the rest of the acts. My 5x build is level 72 and I’m in Greece on legendary. It’s going well and I’m moving through just fine (for now). Difficulty wise, if I switched to play EE now, any ideas if it’ll be easier or harder? Should I play out legendary then do EE?