I had an allie that was 30B when I attack haunting I use to get 30.3m per hit now I have hire 83b allie I'm getting less eny reason why..?
If you were at mp a new ally will make no difference to ally plunder. Having a bug ally though, will increase your strength. As strength goes up, the amount you make from something at a fixed size, like the Haunting, will go down. I think in order to make more per hit you need to hit a harder EB.