Is the Lord Ruler going to have his Atium batteries, like he did when Vin fought him? Or will he be younger. He would definitely have atium. Either way, I dont see how he could lose to Sazed or Marsh. The Lord Ruler just had 1000 years to charge up his Feruchemical stores. Sazed had a few decades, obviously he gets his stores from the Well of Ascension. And Marsh had 2 years, but I dont really know at what particular time he got his Feruchemical Spikes.
How much Breath would Vasher get? 5th Heightening? Because that is going to make a huge difference. Also Susebron will have all of his Breath? Because if he does, he should be able to make the entire arena come to life.
Also how close to Elantris are we fighting?