Unfortunately, with dry kava, a lot of it's potency is attained through the amount of particles you ingest. The more material you remove, the weaker the drink will be and the more you waste your expensive kava. There is a balance everyone needs to find where you minimize the negative side-effects of having having too much sediment, but you still have enough to reasonably effective and reasonably sized dose.
Lightweights can get away with more scrutinous filtering, since they are naturally more sensitive to smaller amounts of kava. But me for example, I need more sediment to even begin to feel the effects. The Aluball alone, to me, pushes the lower limit of fine filtering that's still fairly effective...but it's still a little too fine for me. 70 micron is about as low as I'd ever go and I rarely do 70 as it would just be too wasteful for me. I've personally settled at 100 micron as the best balance of potency and reduction of stomach discomfort. I can like the effects of an even larger micron like 150-200, since it will usually be quite potent, but the associated stomach usually makes the experience less enjoyable overall. It also increases the swiftness and severity of dermopathy kicking in and typically makes me feel worse the next day.
In your filtering example you said you run the 200 micron last. That's not necessary if you've already passed it through the Aluball and 70 micron bag. 200 micron is relatively large compared to the 70 micron bag, you should only need that one. If you want to experiment with filtering even MORE out, you need a strong 50 micron nylon bag.