if you're talking about the last 2 maps....well , you need 3 healers for the 7 map , with at least 400-500 (so 3 max lvled silvers/max aff should be enough). Hell , you might do it with level 40s as well , depending on how good your other units are. Still , you should have at least 1 good healer in iris , so ...yeah , use her.The fact is , the automatas/dwarfs don't hit THAT hard , but it's a swarm and you also take poison , so u will need to deploy 3-4 duelists + tank + prince , so it's a lot of healing to do. That being said , you need a good mage to 3star it , since the automatas tend to swarm. For example , doing it exactly as in lafate's guide , when i placed cyrus instead of odette , 1 automatta lived and managed to only 2 star. And cyrus was maxed (lvl60/max aff)