Talent Priority:
90% of his damage is reflected in his Normal Attack, so this is the one that should be crowned.
Her Elemental Skill is very important, as this is where Hu Tao gets the attack power for scaling all of her damage.
Her Elemental Burst is an area nuke that deals great damage, but crowning it is not mandatory.
In summary, the most important is his Normal Attack, but both the Elemental Skill and Elemental Burst are also important and directly affect his total damage. If you have extra crowns, Hu Tao can be an excellent option for triple crowning.
The ideal setup would be 10/9/9 in terms of Talents.











