I tried Daredevil, and I felt like it gave me draw when I needed it the least. By the time I am running 2+ ICE servers, I have the pieces that I need installed. The tempo hit of an extra 4c to set up also hurts.
I don’t think that +2MU is mandatory. I rarely feel like I’m MU constrained with Astrolabe, and the extra draw helps me most in the matchups where I need help: asset spam.
With Net Mercur, I do not find the occasional extra stealth credit refreshed by Mirror be particularly helpful.
Gauntlet I do see as a viable option, at 1 influence and HQ multi-access is quite powerful.
Maw is powerful, but expensive and influence-heavy. It is nice against asset-spam in that it trashes the agendas/punishment cards that will accumulate in HQ, but the tempo loss is significant.