Lich
He is a little similar to Kang Kung in terms of strategy but differs slightly due to him summoning actual minions. His attacks consist of launching six spirit attacks at random, summoning two lich minions, a dangerous Lich Slap attack that gathers power for one turn and attacks the entire team on the next. The Lich Slap is his most dangerous attack and should be braced for.
His most dangerous assets however are his Lich Minions and his ability to use them. The Lich Minions themselves are a pain since they can leech life from doing damage. These minions must be dispatched just like Kang Kung's falling objects because aside from the fact that they do damage and heal themselves, he can sacrifice his minions to heal himself which will make the fight longer and tougher.
If possible, like Kang Kung, bring heroes with heavy-hitting AoEs to quickly dispatch the minions he summons. At this point, most heroes should have a mix of area skills and single skills to do this fight with relative ease.