Only the one that has the highest effect value of the officer skills that are the same in skill effect will go into effect.
 
Recommendation of officers for battles in the battlefield
Best Group:
Kung fu Maid
Mighty Alice
Snow Fairy
Marco Rossi
Lion General
Tracy
Advance Group:
Lee&Headless Knight(S)&Witch&Pumpkin Man&Iron Will&Guan Yu&Lucky Star-X&Demon Queen&Monkey King&Edwin(S)

High cost-performance ratio group
Nur&Headless Knight&Top Player&Steven(for rally)&Ellen(A)&Sally(A)

Recommendation of officers for inter-battlefields battles
Best group
Sally(S)&Patrick(S)&Kung fu Maid&Snow Fairy&Flora-X&Valentine Girl

Advance group
Mr. & Mrs. Jones&Lucky Star

High cost-performance ratio group
Tornado&Patrick(A)

Recommendation of officers for reinforcing allies
Tracy: special recommendation for reinforcing allies in other battlefields.

Recommendation of officers for raid battles
Roger(A): Recommended officer for attacking Evil Toys, the Mad Scientist and Fanatic General

Recommendation of officers for attacking Evil Toys, Fanatic General and Mad Scientist
Quality A
EOD: Can be used to attack Mad Scientist and Fanatic General.

Quality B
Chris: Can be used to attack Evil Toys.

Recommendation of officers for gathering resources
Quality A
Demeter

Quality B
Bull