Consider trimethylglycine as the addative to the selenium. Is known to tip the balance for folk reacting negatively to the SE, by jumpstarting the methylation cycle. TMG has triple-action in reducing homocysteine levels in comparison to the dual-action of SAM-e (S-adenosyl-L-methionine) (TMG is one of the precursors of SAM-e).
... Same family of observations you record on requiring methionine to process elemental Iodine in your supplemental experiences
Methyl-Selenocysteine taken together with selenomethionine can help up the bioavailability of the SE, due to uptake in two different pathways - dosage reccommendations (from a person using ~100-200 mcg / day with skin painting):