My first thought was agreement with Scott about Luke's ceiling. But then I thought about the Duel I just played against Josh, where I defeated Maul with Luke because I got the cards in the right order, even though he had a devastating Maul hand. IWNFY creates the high ceiling simply by virtue of providing the equivalent of really good defense -- if you draw cards in the right order. Discarding your opponent's killing power creates a very high ceiling -- when you aren't additionally discarding your own, which creates Luke's low floor. I have to disagree with Roman about Maul's being the highest ceiling, though. Palpatine's is the only deck that has an unbeatable combo -- YWD + Meditation, guard 5-attack + Meditation, guard/Palp 4-attack x 2, Lightning + Lightning, Lightning + Lightning. That will kill any character, barring a colossally good stroke of luck (e.g. Vader draws YSANC or Obi draws FB on a first-card draw on either of the two turns preceding the lightnings). No matter how good a hand Maul draws, he is weak to forced discarding -- IWNFY, YWD, FB all make the "best" Maul hand impotent. I'd also put Obi at a high ceiling, because I actually have "seen [him] just walk up and cream [someone] the way Maul or even Boba Fett can." I've won faster as Obi than as anyone else (2 turns), mainly because Force Quickness allows you to get virtually anywhere on the map to use his really good cards quickly.

In Italy for thirty years under the Borgias they had warfare, terror, murder, bloodshed, but they produced Michelangelo, Leonardo da Vinci, and the Renaissance. In Switzerland they had brotherly love, they had five hundred years of democracy and peace. And what did that produce? The cuckoo-clock.
- Orson Welles