It turns out that Skullophile was right! The Future Sonics dual flange deep insertion tips (and yes, my friend, they do go deep) actually brings the bass up to where it needs to be! I just got through "Thebes" by OM and was blown away. The future sonics tips have salvaged the low end and still retain 95% of the unnaturally natural high end of the Phonak Audeo tips. These things sound amazing now
Tip if you want them: If you go to order them through the Future Sonics website, they'll want to charge you $11+ for shipping. Email them and they can work something out for you with USPS for a few dollars shipping. Alternatively there is a vendor on eBay selling them for $15 flat. I got them recently and while the mediums initially looked way too big for my medium-sized ears, they actually work great if you don't mind the fact that they dig a little deeper than usual. Cheers!