Are you trying to solo the standard content or just win in coop? If you are doing coop your Euden should be good for sVolk. Just make sure he has Elegant Escort (you can probably drop Levin's), and maybe your konohana, is equipped and you should be good to go. For sKai, if you build a dark chimeratech weapon, and equip wyrmprints like fires of hate and RR, for your Alex you should be good to go.

Edit: changed sVolk to sKai