Plan A) Sunbreakers + double Flare grenades + high discipline + any rocket launcher able to fire two or three times before reloading + Ice Breaker. 1-Run in and lure out the Wizards. 2-Snipe them (do your best to stunlock them by timing your headshots). 3-Run in and take out the Shriekers with two rockets + a few Ice Breaker shots each. 4-Take out minions that are wielding guns on the side that you went to second (most of the Knights will remain where you lured the first Wizard) up until the 30 seconds timer show up. Only target the sword Knights if you can't see any ranged minions on the side you went to second. 5-Run in, throw a Flare grenade [b]under your feets[/b] and empty your Ice Breaker on the Deathsinger before switching to your heavy/primary. The Flare effect will keep the Thralls/Knights off you for a good amount of time. Plan B) Same as above, but replace Ice Breaker with Gjallarhorn (if you have that). You might need a primary Solar weapon (such as VoC) to take out Wizard if you can't carry plenty of Sniper ammo. Being able to keep those Knights/Thralls away while you finish off the boss really helps in this part, there's less pressure than if you also had to take them out in a hurry (wich often results in players dumping their grenades on the Deathsinger before jumping right next to the other side's minions, trying to beat her down in time).