Best sac outlet?

[Spencer Addington]

So, as the name suggests, I'm looking for an A level sac outlet for my sac deck. I love {grimgrin, corpse born} and {bubbling cauldron}, but I need one more so I can consistently draw into them.

[Spikepit]

 {Attrition}

[Gorzo]

{Viscera Seer} is a popular modern sac outlet.

[Kaleo42]

 {Altar Of Dementia}
{Ashnod's Altar}
{Phyrexian Altar}