Double lushens GB10 help please

My team comp:

Lushen 6 12k hp, 2.3k att, 568 def, 128 spd, 54 crit, 187 critdmg. Maxed skills

Lushen 6 13k hp, 2.1k att, 570 def, 123 spd, 62 crit, 182 critdmg. not maxed

Orochi 6 17k hp, 980 att, 630 def, 117 spd, 100 crit, 100 acc. not maxed

Bernard 5 16k hp, 408 att, 720 def, 168 spd, 75 acc. maxed

shannon 6 16k hp, 800 att, 700 def, 143 spd, 80 acc. maxed

*monster box : http://imgur.com/pzoXioT

I can't seem to beat it at all. its like a 20-40% chance. any solutions?