Hmm the only way to farm faster is to make your first Team very speedy (800+), very strong (Squad Power 100000+) and hit the "Next Button" as fast as you can
Some Girls boosting your Squad's Speed:
http://harem-battle.club/wiki/Flower.../FKG:Edelweiss
http://harem-battle.club/wiki/Flower...l/FKG:Oncidium
http://harem-battle.club/wiki/Flower.../FKG:Anthurium
http://harem-battle.club/wiki/Flower-Knight-Girl/FKGipladenia
http://harem-battle.club/wiki/Flower...rl/FKG:Alpinia