User blog comment:JBox2D/Irelia Rework Concept/@comment-5588011-20150712192615/@comment-24090662-20150713050006

The ultimate would actually use her autoattack frame so it would be less bursty than you imagine. The point of it is basically that she actually gets to feel like she's telekenetically throwing swords at you for a bit. It's supposed to be similar to the way Azir works.

As for how she'd build, she probably wouldn't be able to go full assassin because she has no escape mechanism so she's stuck in a fight once she engages, and her burst is still quite a bit lower than Talon/Rengar. That said, the kit is specifically supposed to make bruiser builds worse, which is the compensation for the massive true damage she'd be able to do. I expect she'd end up building something halfway between bruiser and glass cannon, prioritizing resistances over health.

Trinity is probably still core given her Q and the fact that W and R can both generate lots of procs. Hydra would probably be better than bork because it gives more sustain and flat AD. I kind of expect that three offensive items would be the best for her, so you'd probably also throw a LW in there. Past that you'd get situational boots and some combination of SV/Heart/Banshee/GA for defensive items. GA would be especially good.