Amber is better than Lisa. We meet Amber when we first travel through Mondstadt. Amber is the first 4 star character that joins our team.
Her burst has high scaling. At level 13, it is 1074% scaling with a 40 energy cost and 12s cd. Assuming she has 61.6% pyro dmg bonus (from 2p crimson), the dps is $$x = 1.616*1074/12 = 144.632$$ This is ignoring any possible reactions. The damage is also aoe.