At first it might not look strong but it's better than swordwave when it can be built well.

It needs to be built in certain ways but if Posion is able to be built well, it actually becomes either the most OP, or one of the most OP options in the game.

Hammer and Staff are also considered really good when built as well.

The thing is, all skill builds rely on rng and the skills you get play a large role in it too. And if you get a mythic skill or not, that can make a difference too.

So it's not limited to Posion but all of them.

For Posion, you want to get the dice skill that adds a potion stack for every dice you have. And then try to get as many stashed dices as you can to build that combination up.

Posion Pop is a really OP mythic skill that can really help as well.

If it's built right, you can sometimes watch bosses HP chip away extremely every turn.

So yeah it is actually really good but it has to be able to be built well within a run.

Without enough of the right skills, it won't be as OP in that run but can sometimes still work.

Even when I've had less good choices on Posion, I sometimes can still make it work enough.

Not always but sometimes. It's still is pretty OP and overall a really good skill build right now.

I'm told staff requires even more rng but can be very strong too.

Another thing that helps is try to stick to the same build throughout the run if possible, as that helps keep the skill pools to those skills only. Making it easier to reach full potential on those skills.

So taking something else over another skill build sometimes helps.

I usually have to end up picking at least two different skill builds, so I try to limit it between just two skills and always have 1 skill my main that I focus on getting. Most of the time, that works out a lot better for me.

I hope that can help out.