Tyrande is sold as a "damage" and healer hybrid

But her damage is bad. She has like 20K damage in game. Not only that her mana depletes much faster than any other healer and barely do more damage than anduin for example

Where?

It is actually quite okay for her role. You just need to know what you are doing.

Where did you get these numbers from?

She was nerfed quite a bit recently by removing the bonus auto attack damage from her level 1 skill. Additionally her damage role only really starts at level 16 when she gains stacking damage bonuses.

It depends on your team and the enemy team. If she can basic attack constantly then yes.

Hunter’s mark, trueshot aura, a built-in quest that does what? More damage to her skill on completion. Starfall = damage. 2 of her 16 talent are purely for damage (more damage to own and normal attack buffs on consecutive hits. A level 20 talent that gies her attack speed. With those kind of talent you would think she’s a hybrid between damage and healer but she’s not. If most of her talents are giving her more damage, I expect her to do more than other healers.

The truth is she’s build on hitting heroes but anyone can easily trade hits or dive her and when it happens there’s not much she can do about it. Anduin has the same mecanic e.g. hitting enemy heroes to heal but he can still heal decently even if he doesn’t do that. he can actually save people and she can’t. On top of that she burns he mana MUCH quicker than most other healers if she spam heals.

You say her damage is ok for her role. I disagree. She should at least contribute in damage if she’s overall worse in healing. She needs buff. Like double her lunar flare damage or something. Her lunar flare is a skill shot, very tiny aoe, very high cooldown (13s) and what does it do? Barely any damage.

You want me to take you seriously when you cannot even propely classify her E? Really?