I'm struggling with boomkin DPS as well. Made a very simple little addon, that checks your eclipse status after and right before entering combat. It switches to actionbar page 1 when your eclipse points to the lunar direction, and it switches to actionbar 2 if it points in the sun direction. So I have my starfire rotation on key 2 of page 2, and my wrath rotation on key 2 of page 1. It doesn't work as well as managing it manually, but at least you get to use your eclipse on some level.

Addon can be found here: http://blubber.student.utwente.nl/~blubber/