I'm not using a mouse, BUT looking at it's specs I would strongly suggest something with a thick lower mid push and possibly a bit of subtle decrease in the highs.
UA solo 610
pre or the 6176 strip
for less cash maybe a gap pre73
for really cheap maybe an art mpa gold, whatever the current mpa version is (wiht high plate voltage switch), or possibly the new pro channel 2 (the 2 being the important part) which has high plate voltage.
this IS low end theory after all :-)
those pres have decreasing amounts of darkness/thickness from the top row of my list to the bottom, but all, even the art models, are notably warmer than most other preamps.
However I've heard such positive reviews of the blue mouse
that probably just a really good clean solid preamp would be fine. not an uber cheapo, but something with good performance (which can still be an affordable model).
I'll tell you that I own some excellent vintage fully transformer in/out mic preamps and cheapo art preamps and with my blue kiwi
(which is bright and present but in really great ways and is an amazing vocal mic for commercial music). That mic sounds great with all my pres, modern, vintage, expensive, cheap, but sometimes an art mpa gold is just the ticket to make the vocal sing.
If people forget about price and keep an open mind it's amazing what you can do with gear regardless of price or how "high end" the gear is.