Assuming you have all level 10s, I've found that running two kits with their companions being a canictonis (swan-scorpion) and lunaria (three-eyed cat) will beat simburs. Usually just these four can beat a simbur, and the 5th slot can be used either for another level 10 (probably jocol for the healing) or wolves you're training.
So your loadout should look like (in order from top to bottom)
kit
kit
canictonis
lunaria
[extra]
Keep the kits in front because they have higher defense and their special skill is good against enemies.
