You fight them one at a time. The first had 2 axes and at least 10 thanes. I ran about the romm one shotting everything then froze the ghost with my thune to regen.
After dispatching him the fight got hard. The second brother had a bow that one shot me even with 125 hp 180 armor. Not much but I'm a mage. He also had 3 shades that all use paralysing shout. They spawn in random locations. You have to avoid all 4 shouts and arrows 1 of which insta kills but you cant tell which is which. Sometimes he spawns right next to you and your screwed. It took an hour to take him down. I got him by sneaking when he teleported and quickly take out 2 shades or locate which was him. Flames was cheap and useful for taking them out while avoided the real one.
once he died I began the tea bagging process until the last brother who is a caster interupted. He kinda ran around letting his atronach chase me. He went down fast.
Hardest fight to date. Anyone else have a tough fight?