Well 3+ full SOT runs through AMoLaD (5 SoT per run) to get enough fragments for 1 666 soul (and 4 Precious Souls). But that 1 666 soul did drop a 5 star character (Shaman Eddie). It's all sacrificial meat for me anyway unless VHE drops......
I mean, it's all free frags for standard play. So, I'm not really complaining. I just think the 666 drop rates are pretty low if this is an indicator in any way.