Doing only Normal = Casual.
Doing EX and Savage = Midcore BUT leans more towards hardcore on the scale.
Ultimates = Hardcore...

- Infact there is no true midcore in this game...
Its either very easy or very hard.. no inbetween..

Note: Some EX can be very easy and just 1 step above normal,
while others are harder than some savage fights.. so EX fights have very wide range.