Is max poisions a "wasted" or bad stat ?

So I have really been enjoyed my PConc Pathfinder, however I'm wondering how many max poisions I actually need as they have downsides that seem fairly big.

The reason is that with scattershot you apply 3 poisions at a time and the "strongest" ones override smaller ones. So if you have a max of 3 you always have the strongest 3 up, but if you have a max of 5 but have 30% reduced magnitude then you have more poisions but each actual poision is smaller.

You could get to something like 10 max poisions but while clearing having to do 4 attacks on a pack to hit poision cap seems really bad. And since poision prolif effects only spread 1 by adding more max and making each smaller your make posion prolif worse.

So I'm wondering I'm a technically better having a max of 4 and then just going really hard on the actual hit to scale those 4 compared to getting a max of 10 and each one being smaller damage.