About the witchhunter professional sublimation talent - Sorcery Ward

After tough battles, I finally got the Sorcery Ward after completing the fourth trial.
My questions:
1. How to achieve its quality effect?
2. The definition of the Sorcery Ward is effective for elemental damage. But after testing, it was found that it is ineffective against the damage of ignited ground. Shouldn't ignited ground also be elemental damage?
3. Compared with the difficulty of obtaining it, the effect of the Sorcery Ward is very useless. After many battles, I found that there are not many scenes where it is effective, and it reduces my armour and evasion. As a result, the survival rate of witchhunter has not increased. It is recommended that it is also effective for chaos damage.

You just need better gear for sorcery ward. I'm still at 73% evasion and 30% armor with over 100% resist and 64% chaos resist, and 3k life. I survive just fine on t16 juiced corrupted maps.