I have sacrificed two and a half stacks of regular souls and did one tier V and got a sentinel and warrior to add to my Magus from last years event so not great but I have all three pumpkins. Not sure how much I will bother trying to do a lot more as I do not have or want to sacrifices my non-dupes of any type to be honest (even though 90% of them are rarely if ever used). Will keep grinding away as would like to get a vortex this week at least to get some more SS.