It's two bolt decks, so take this with a grain of salt, but the simulator has Lumi's odds of winning each match at over 75%, which would mean he's more than 90% likely to win the best-of-five.
Grats to maj, I guess, on a match well played.
I'd still love to see some descriptions, as Anthraxx requested, if only because it's my favorite part of battle results posts.