And I just beat him last night! Goody!

The most important thing I can think of for this battle...well there's two of them.
1.) Get rid of those damned Dead Bones. Once you're rid of them, Zalera shifts out of Defense Mode, and
2.) Set you Resurrect gambits to Phoenix downs and highest priorities. Curaja helps, but Phoenix Downs, having no charge time, will quite literally save your life.

I would recommend when he's getting low on life to try and get as long of a Quickening chain as you can...Black Hole is, of course, ideal, and if you're adept at getting that one, change "low" to "about half."

OH! And Shell halves the effectiveness of "Kill." Remember that, okay?

[EDIT] Oh, and I realize you weren't technically looking for battle strategies, but I figured, y'know, forewarned is forearmed.