Wave 4: 2xSoldier/Mage
The hard waves begin! Two Corrupted Risen Soldiers spawn and immediately both begin to cast Knife Dance.
Shackle Undead the first one, then immediately Shackle Undead the next one before too much damage goes out on the party. You will then immediately Holy Word: Chastise the Corrupted Risen Mage as they will have gotten to high stacks.
Continue alternating Shackles on the Corrupted Risen Soldier as needed to interrupt the Knife Dance, this is a good wave to utilize Apotheosis to heal through the Fixate and any Knife Dance damage that may have gotten through. Apotheosis will also allow you to reset the cooldown of your Holy Word: Chastise very rapidly if you are able to use some Smites while keeping the party alive. If you and another party member are dropping low, this Wave is also a good time to utilize Guardian Spirit to survive.
Wave 5: Soldier/Mage/Archer
Going into Wave 5, you MUST have your Holy Word: Chastise already off cooldown and ready to utilize as
this Wave requires a very precise sequence of spells to ensure stability. As the last wave activates, step back near the middle of the room and start DPSing the Corrupted Risen Mage. When the Corrupted Risen Soldier begins to cast Knife Dance, Shackle Undead him, then Holy Word: Chastise the Corrupted Risen Mage, then turn around to Shackle Undead the Corrupted Risen Arbalest who is now casting Mana Sting on you.
This sequence is imperative to pull off and will provide optimal nullification to all of the different mobs most deadly abilities. Once you have completed this, continue to damage the Corrupted Risen Mage and continue alternating Shackle Undead to interrupt Knife Dance's and Mana Sting. Do not be afraid to use Guardian Spirit if you are worried that an NPC might die, use it wherever necessary.