Can anyone tell how hard is Furious Frank and is there a knack to defeating him ? i need to get this book
As noted in the Coliseum section's comments, Frank has 30k health and is a dual Attribute tech using boss. The difficulty level is fairly high.
That said, I have noticed that using
Trap techs that can paralyze/stun seems to work fairly well on Frank. If you have r2 or higher techs like Improved Pit Trap those could probably help. Additional fleet mates and high atk/def stats on your party will help too.
Cheers, great online voyaging to you.