So I was thinking of 3 cycles with the same liquid (sequezing/ working the seeds) and doing 3 pulls in total (as tao tek suggests), so 3x3 boils actually.

You refer to 5-6 boils with fresh liquid, right?

My thought is that the problem seems not the solubility (would require more fresh liquid) but to get the alkaloids out of the cells, but I might be wrong here...