i would listen to my body and give it reasonable amount of fat as i feel the need to be, i would prefer it to be initially in terms of cold processed healthy oils, as nuts and seeds could be hard to digest initially with this phase and then definitely would like to add more nuts and seeds.
i can definitely take seeds powder, fenugreek and flax as you suggested being primary.
yeah i would clean my colon and would do intermittent fasts and then when situations are right would go for longer fast.
if the swelling is as you mentioned, then triphala churna and hot water tea should really help, let's see.