So should I just not get any two-handed perks at all?
Oh, you. You troll with innocense so well :3
In case you're srs, if you're going for the best Ebony Blade-wielding character you can get, go for all the perks that'll make you stronger. The perks that increase Two-Handed weapon damage and critical attack chances, make power attacks cost less stamina, beheading, sweep, etc.
And then there's Smithing, Enchanting, and Alchemy. Depending on how powerful you want to be and what difficulty setting you're going to play, of course.
Now play it like you didn't understand something I said. I love it when you annoy people with that x3