When Is a Shard Vessel Combo Most Powerful?

When is a shard vessel combo most powerful? Is it at the beginning? Maybe when they've just come together and as far as they know, they're really well aligned. I think these are questions we don't have answers to, but I think they're really interesting questions to start thinking about. One of those pieces that we had on Scadriel all the way back to Era One, mentions of Trell and Trellagism. That's what we're calling the ancient religion on Scad Ariel.