I don't think Tony would necessarily win her over by pointing out he's the biggest villain, however. Trish is too emotional of a player, and I'd guess would be more likely to want a backstabber out than to take him to the end.
That's why you don't sell her the villain angle...
yet. You play up the fact that Jefra was making "deals" with Spencer/Tasha/Jeramiah, and sell her on the fact that this late in the game, you need people that are 100% honest. It's a load of horseshit, but you saw it after the LJ play just how quickly Trish forgave Tony, understood his reasoning, and trusted him completely. Sure, it's going to take some wooing, but he can easily pull her back into the fold. They've been together since day one and she obviously feels like they have a "bond". Now, once you get rid of Kass and Tash/Spencer,
thenyou sell her on the villain angle. At that point, you leave
thatas her only viable option of winning, and she'll follow right along, yet again.
He can't keep Kass around. Kass is too smart and too much of a talker. She's going to start figuring out that she has to take out Tony, Spencer, and Tasha to win the game. Essentially, she's the last "dangerous" social player left. Tasha is somewhat dangerous also, but if you take her numbers by voting out Kass and Spencer, she won't really have any options. Even now, only immunity has been saving her. She'd have been a
muchbetter target than Jefra, but they couldn't vote for her. Taking Tash out would've eliminated a girl
andkept Tony loyal to the alliance.