I have to confess: I am not a GLD by passion - I am forced to be a tank out of necessity.
I have LNC50 and CNJ50 from FFXIV v1.0.
Tanks are in a high demand - can't get a dungeon party as DD for 30+ minutes and getting as GLD in just 30 sec.

My stats as GLD32 are:
HP 1240 MP 389 TP 1000
STR 133
DEX 103
VIT 158
ATTACK 133
SKILL SPEED 200
DEFENSE 224
PARRY 194
CRITICAL HIT RATE 206

I open a fight with Shield Lob and Flash, then Fast blade+Savage blade+Rage of Halone and then repeat the chain against my target. I do use Provoke on my mob.
I can self-heal to some extent using CNJ and PGL healing and evasion skills yet ... I can not generate the hate to keep all the mobs on me!

The healer is targeted by secondary mobs, start kiting and dies. Then I die.
It is not an easy job to be a tank otherwise there would be plenty.
I read a lot about tanking job on the forum, skills and UI layout.

What am I missing?

Appreciate the reading and happy tanking :-)