It used to be that Ambush was the tough one of the 9-Ep Objectives. It has become a collection of wuzzies now.
The Shamans, with their evil healing powers, are now the bad boys on the block, but still very beatable.
One thing that really works, especially if you have a multi-hit and power-hit char in company, such as fighter or samurai, is to alternate these two abilities when you fight. No need to get them to 200. 100 works just fine.
The multi-hit forces the shamans to stop gang-healing the main target, and will heal themselves instead. All team attacks go on one shaman when this happens, and this is where you pop the power hit.
If you have a caster in company, let him also splash the shamans, to help mess up their AI healing skills
