I skipped around a bit, but one thing I noticed is that you tend to favor drones that occupy most of the soundspace. I would try to dial some of those drones back into the mix so that other voices can poke out a little more clearly. The high end seems a bit harsh in places. Was most of this recorded as a realtime improv? I would also vary the effects settings for each sound you introduce (eg, don't pan all of the echoed sounds from left to right), so that each one sits in a different part of the mix. Some of the fatter drones seem a little preset-ish; I would try to dial down the LFO-wooshing, but that's just my stylistic preference.