[Q] Need some practical ROM advice topic

So I have had a rooted 1st gen Fire for a while now. Mostly I've just used OtterX builds.

I love the ability to use the more advanced Android platform but to be blunt? This is unfathomably slow. Not only does it take forever to open even the Twitter app, the persistent power drain is obnoxious.

Are there any low-CPU use ROMs out there? Should I just go back to stock and then add Gapps to that? Could use some advice.

Regards,
Lepha