Turmoil Zerkers offer nearly the highest str bonus possible while staying relatively low combat. In their combat range you are pretty much screwed if you're not a Turmoil Zerker yourself.
They hit extremely hard and extremely high for their combat levels, and are designed to be very offensive, hard-hitting machines in the wilderness.
A perfect zerker account would have 99 magic and 99 ranged as well, which gives you a little bit of diversity in your PKing and allows you to use things like vengeance etc. to aid you in your PKing.
Turmoil zerk with Chaotic maul or Rapier [ Maul especially] rapes, i have a bunch of them and my maxed one has a KDR of like 16-1, according to that pkking hat
Turmoil Zerkers offer nearly the highest str bonus possible while staying relatively low combat. In their combat range you are pretty much screwed if you're not a Turmoil Zerker yourself.
It's just good to have defence in general when pking. Normally around cb lvl 70-76, the loot wont be that amazing, so you might as well get defence levels so you can fight with people that will bring more gear.
They have one of the highest damage outputs among all pures, considering the low combat level yet high strength bonuses. I believed a fully maxed zerk maxes at 124 combat. One problem that zerkers encounter is going up against mains. Obviously the latter would have higher defence, making it a tougher challenge. Personally, I prefer addy daddies. Although they cannot use vengeance.