Bile trolls are the most unfun, BS thing you can fight in this game. They’ll regen to full hp in like less than a minute. All their attacks, all of them, go through your block. It’s almost impossible to dodge their attacks. Its AoE slow/blind/stamina drain/DoT is insanely strong. It runs at mach 5. There is almost no telegraphing. They’re just not fun. On Legend they result in wipes so much because they’re so insanely difficult to kill half the time. Especially because they’re sent with endless specials and a horde and regenerate at such ridiculous speeds. They have periods of time where they go invincible. They were certainly a joke in beta. They make even Sigmar shake in his boots now.
I normally try to just play around stuff, but it’s practically impossible to play around troll. You just have to hope you nuke it fast enough. If you even can.