Well, I just got a task of 190 dagannoths for the first time. I've never killed these before, so I need to know where its best to kill them? And what method.

 

I don't have a cannon if that is needed.

Wear prayer gear and kill in CT.

Lighthouse if you have done the horror from the Deep Quest and if you havent only other place is Waterbirth Island and Chaos Tunnels as said above,

Ok, thanks for the info.

The best place is lighthouse tho. They seem to hit less.

Well I'm killing in the chaos tunnels right now, seems easiest, as there are plenty to kill, so I just pray range, put on auto retaliate and repot pray when needed.

there are plenty in the light house to. And you dont need to pray there either.

I'm too lazy to move there now that I'm already here though x.x. Thanks for the help though.

haha :P No problem. I would suggest going there in the future tho.

Chaos Tunnels have better charm drops anyway ;) Lighthouse is really only better if you're cannoning.