As more data is gathered it turns out the community was wrong about the importance of player IIR stacking.

Please remember to have actual data before joining a digital mob about how something has ruined PoE2 forever until it is fixed.

Turns out the best thing to do is quant, which is just stacking tablets that are easily craftable by any build. Having 300-800% IIR on your character was just a waste of money given the diminishing returns IIR has after 100-200