1. Anvil of the Void. Being a Grey Warden whose sole purpose is to stop the blight, I believe that most Grey Warden's would have gladly accepted an army of Golems to ensure victory against the blight. Yet, the nagging issue for me is the imprisonment of souls. One of the greatest aspects of DAO is the Warden's capacity to defeat the blight, in spite of doing things that Grey Wardens wouldn't normally do. My Warden also saved Amaranthine when the typical GW would have burned it to the ground and made a stand at Vigils Keep.
2. Dark Ritual. Its a weak choice based on when its proposed because you have next to no information to go on. Take it or die, you have no idea of the consequences of the outcome, though its fairly implied to be negative. As we see it played out, its result seems to be next to nothing of consequence. Hindsight is 20/20.
3. Well of Sorrows. In the DA tradition, its a weak choice that is forced upon the player without a whole lot of information as to its outcome or consequence. DA writers love their secrets, and every one is so awesome it can't be revealed until DA8. Ultimately my Inquisitor drank from the well... ONLY because my canon Warden romanced Morrigan, performed the DR and went through the eluvian. It would have been nice to make the choice as the Inquisitor, but because of the murkiness of the choice, my Inquisitor had to defer to my inner Warden, who always would protect Morrigan, in spite of herself. Weak, bad writing/design.