Guild Wars 2

Thats sad, it sounded like:
if you get much toughness and a shield you will get aggro.
But thats seems to be not the case then.

Hi,
my guardian is 60 and i tried a few CM runs with my friends to test/learn how to tank.
I’ve heard, that the aggro system gives you aggro for:
damage
toughness
wearing a shield
be close to mob

So i tried a “tank” build
0/0/30/20/0
first i tried all berserker like gear
then i tried a mix with armor berserker and rest knight
after that i tried all knight

with berserker i tried GS
with the mix i went for hammer
with the knights armor i tried: 1h/shield, GS and hammer

i was equipped with masterwork (green) items all the time and my friend a 49 warrior with berserker like gear (all blue) was the person with most aggro.

i managed to tank bosses now and then but every single bossfight my warrior friend had aggro for 50-80% of the time.

what did i do wrong?
if the aggro system really works as described before i should have got a lot more aggro with all knights and 1h/shield.

if that does not work is it best as a guardian to go full berzerker with GS and just support with boons?

i would love some advice

p.s.
this was the guide i was using for the spec
http://www.guildwars2guru.com/topic/70142-after-100s-of-hours-my-final-guardian-build/