Unfortunally yes for the bonus set. I don’t find a more powerful fire Eye of reckoning Shieldbreaker if i don’t play the cyclone set. But are you sure the damage is split like this ?
Yes I am sure. How do you think it would work? The item you equip first will determine which of the skill conversion which will occur?
The sword also has global lightning to fire conversion which will convert some of the flat lightning damge that you have (like the flat lightning added by your gear, and the flat on soulfire)
You can just hover over your skill tool tip in game and see damage breakdown.