As long as you're not playing against mill and you haven't gotten your other planeswalkers, Liliana just searches for her friends or a finisher or whatever other answer you could want. I was running her as a 1-of in Esper control to find answers when needed. She's like a Sidisi 2.0, but better. For life gain, Radiant Fountain can work wonders along side Pearl Lake Ancient. It may hurt your colors a bit, but I think it's better than Feed the Clan taking up sideboard space. I would also recommend Ashiok because... Ashiok... lol.
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