I can't speak much to lady malice, but I did toy with both the baron and urien for a bit. The baron's praises have been sung so I'll leave that be but urien is an absolute beast in challenges and a master of the pain token shuffle. Usually I ignore the pain token thing until it comes up organically in a game like it's supposed to UNLESS I run a hellion mob, who in my opinion really need it. I bit off on the noob bait and bought like twenty of them so I want to use them. Anywho Urien starts with the Hellions and gives an extra pain token to a wrack or grotesque unit, the baron starts with the 2 token wrack unit. Then shuffle as normal, hellions gain two tokens coven loses none. Between the clone field, t5, fnp, and auto wound regen urien loves challenges. Oh and by the way he instant deaths on all of his attacks. Casket can be funny. My friend cried when i rolled s6 ap1 9 shots against his deathwing unit, then i cried when i realized they were all snap shots because urien was falling back when he failed his garbage leadership (9, REALLY?). I cried again when the hellions were lit up by a divination librarian terminator unit who rolled ignore cover saves and deep struck next to them twin linking. Urien still never died that game, and he's always worth taking against PA armies if you just really don't like giving up slay the warlord.