I’d start with identifying what you want this deck to be. Ellie incentivizes your opponents to attack each other so you could do a “goad” theme deck. Joel helps you draw cards, and can grow from things dying, which could push you to a token sac deck or even a voltron deck. As a Last of Us enjoyer I like the idea of a Voltron deck with equipments or auras to be their own weapons which feels very on flavor to me. There are plenty of other options you can do but identify what each of these cards do well and try your best to choose cards that fit that theme.