I was just wondering what software do you use for editing, because you could try the Reel Smart Motion Blur plugin and speed up your entire process. It's pretty darn fast and takes advantage of multicore cpu and gpu acceleration, best thing is you wouldn't have to record at 180fps anymore
You can see a demo of what it does for game footage in the clip below (you can skip to 2:00).
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Hope this didn't sound too much like product whoring since it is my only post here, but it's a good plugin (I use the version for After Effects) and it saves me a ton of time since I have to re-render footage multiple times according to very valuable client input
LE: here's a link to their compatibility page
http://revisionfx.com/products/rsmb/compatibility/