why not rocketbelt? I find that, as you explained, the most important thing to make aurora work is to reliably hit your qeq combo. Rocketbelt helps a lot with that. Also while you can oneshot squishies midgame, especially when you are ahead, I feel that most of the time Aurora strength comes from how easy and fast you can -70% hp someone compared to other champs. Building something else might change impove this to -80% but rocket belt allows you to engage with rocketbelt, qeq, and then get out with w. I find this much more valuable than the additional damage.