I just tested both situations. Yes with Avenger Crusher + Bladetwisters, %100 Lightning>Physical comes first;
But my situation again;
Main Hand Chillheart + off-hand Blood Orb of Chthon + Flame Touched. WD shows both fire(because not %100 conversion on chillheart) and cold damage; when Blood Rite activated no cold and most importantly no fire(if main hand conversion come first there should be some little cold damage).
But; Blood Rite is a buff so
This might be the reason I have had different results. I don’t use GDstash so it’s harder for me to test and as far as I know there is no %100 global conversion on 1 hand slot nor the off-hand slot so need a GDstashed items to test that properly to see if main hand override off-hand or the opposite.
Little PS: when two buff collide; (Beronath on MH/BOoC on OH) they are treated as equal so %50 of elemental goes into phys, other %50 goes into chaos.
And apparently it’s not just related to Elemental Conversions but all that conflict(among global conversions); I wore Bonemonger helmet and shoulder, Galakros Dread Plating, Decree of Aldritch and Gladiator Belt together> then removed weapon slot to see if belt take prior, and it did; converted all vitality into physical so nothing left to be converted into aether although there was still %80+ vitality>aether conversion. Belt slot override chest+helmet and shoulder.