Yup. It stacks up to 3000 HP Max dmg

How does Poison Tai work?

I am Azure Fang player from beginning to now.
I think it's best for late game since her team doesn't do "real" nuke like boom the enemy entire team is down.

Anyone who does AOE Tai such as, Tenten, Kimimaro, Ukon, Kidomaru, Kiba, Azuma Wind Blade, Lee Eight Gates and many more. I like Kimimaro the most, personally preference, free to play and easily to upgrade to 5 stars.

Poison Tai does well against Earth Main shield and those immune to cc's i.e. knockdown, High float, low float etc. If your team can't chase the power team will decrease dramatically. Poison and ignite go through shield and kill them slowly inside. If you have enough healing for team, then your team has higher chance of winning.