Guild Wars 2

I’ve got a few questions about this achievement:
-What exactly needs to be dodged, just the barrage phase aoes? All his aoes?
-Does logging off before the cannon phase and relogging still result in the achievement? (Of course you would need to inform your party this is your intention, otherwise you’d likely get kicked)
-What is the best way to dodge the aoes or avoid them. I know permastealth theif is the gold standard, but are there other good ways to do it?

Thanks for any help you guys can give.

I believe it is just Horrik’s aoes during the cannon barrage phase. You can log off and on during the last cannon phase and run back all the way to finish off the fight to get achievement. Does not require an alt.