I've been working on the Lone Wolf challenge today. All I have left is 4 Bronze solos to go. I just decided to Unknown/Unknown it and got Collectors. I just got Instakilled INSTANTLY by a Praetorian after losing about 2800 shields and most of my health from a Scion's 3 shot burst on a Wave 10 Escort. To put this into perspective, with consumables I can tank 2 Primes, a bunch of Pyros and Rocket Troopers and Geth Turrets ALL AT THE SAME TIME. One Scion drops my shields instantly. On Goddamn Bronze.
The Banshee has no dangerous long range attack and her standard melee is pretty avoidable. The Warp Ball hurts but it's not a game ender, instead she has an instant sync kill. The Praetorian not only has a deadly long range attack but an instant sync kill AND a stagger locking melee which is impossible to escape without your chosen deity's help.
This is no longer a joke. Fix it, get rid of Collectors from Unknown or give a credit and XP boost for fighting them.