Please post your results, strategy, tactics and team composition here. I've only done C10 so far. I tend to try to clear the most difficult ones first. Successfully clear it after failed three times. Not even made it to Dios. Persephone and Sevenzard stops me with their poison so I thought I'd bring double Serket and I cleared it after. Mind you this is, of course, done in co-op. Botched my screenshot lol As long as you have enough HP of decent shield you can stall Dios' 99% shield. Perhaps double Anubis with Baldin can punch through his shield. Key skills are time buff and awoken bind clear for Persephone (I use Enoch and OdinDra). Having a multiple-turns shield like Hysferzen also handy while also lowering the DEF on KingTans.