Curious to see the support arguments for Malgus. I'd agree that FE Malgus wins, but Deceived? Cade takes this, in my opinion. A hard battle, but I personally view Cade as the more skilled, and Malgus's durability is quite impressive but I find Cade's Dark Transfer/Shatterpoint to be a common argument, and I don't see what separates those instances from this one. That could be a means of circumventing Malgus's insane resiliency.
That being said, Cade probably wins 6-7/10 at best in hard-fought, long-drawn battles.