I had a LOT of characters saved up for this sac event so I got the special soul in like 10 minutes. Ended up getting Daedalus so I'm good. Also got Flight of Icarus Eddie just from one of the numerous heroic souls that dropped during the process. Good stuff.

I could probably force another 500 frags if I really started dipping into the rare souls, but I figure I'll save them for the next "drop 300 souls and get a new character" event.