For kru you need a team that does one of the following.
Either does damage without many debuffs. Ewoks work great if tgey are strong enough
Or has healing immunity/shock to put on kru to stop healing. Ep team works well. If you can throw in dooku or dark bastilla for extra shock that's great. They also have no defense of isolate or fracture so traya or thrawn work well in there too. And of course nihilas since it doesn't matter how much kru heals before he takes an annihilate to the face.