Let me restate my reasons for my Agan vote:
I trust TGWBS would not leave us with ambiguous hints or information. This means that either he did not know any critics / cobblers by his time of death and just thought of Fea and Aganzir as the most suspicious characters, or he happened to peg two sinister characters in two nights. Rereading his posts, I can see why there are many around who are unwilling to risk assuming the second - Wild Guy seems uncertain and especially on Day 1 he acts unconvinced of Fea's guilt.
However, if Fea is guilty, I do not think we can risk it to keep Aganzir alive. Of course, Guy may not have dreamt of either, and his categorisation could have been just a reasonable and astute guess. Fea's guilt would not prove Aganzir's guilt, and Fea's innocence would only imply that TGWBS did not dream of any evil persons. In that case only can I see Aganzir survive another day, yet she would still be eligible for lynching in the future (her voting record is not very favourable, either). Perhaps that is enough for most to shrink away from a double-lynch. In my opinion, we have little to lose from it: the ordinary, yet talented singers get to kill two highly suspicious characters, while the critics can only eliminate one potential-gifted or innocent.
I can envision scenarios in which the double-lynch would turn against the village. However, I am feeling bold and reckless.