Seeking advice on 5* cards, which are better for a party

I was wondering if a sword rank 3 Agrila is someone to keep in a party along side my main char and all 5*'s?

And
I was wondering outta these 5* chars which are better to use? Ygress, Pravil, Sir Rogas, Edvard, Hanzen, Nexara (x2, not sure what i can do with a 2nd card), and a Mystery man (crit skill Inmobilizing stun lv4)(not sure his class)

Any advice on these questions will be appreciated. Thanks

If mystery man has 650 def and 440 attack/crit, then he is a warrior and you should replace Agrila with Mystery Man. Mystery Man almost has like 6* level stats. I do not understand why ZQ game made Mystery Man's stats so high...

I haven't used my Mystery Man, but from seeing others' in action, he seems pretty great even still. I'm assuming your starter is Jansen? I suppose Ygress, Pravil and Nex in the back would do alright for the time being, though Ygress and Pravil aren't heroes you'd want to keep long term.

Should use 2 Nexara before using Pravil, Nexara has a higher crit then Pravil by a good amount. Only downside is they can counter attack Nexara when she attacks. But overall she puts out a lot more damage then Pravil and they both use same evolve mats.