Skin for Mortis vs. Lily, a Top Brawler in Solo Showdown

I just got the 'Turbine Mortis' skin from a Smoothie Drop, even though I didn't have Mortis, which was a relief. However, I have a dilemma. I previously decided to focus on leveling up strong brawlers for Solo Showdown. Mortis is a bit of a middle-ground pick in Solo Showdown, and unfortunately, Lily, who is considered a top-tier brawler for Solo Showdown, is also an option. So, I'm wondering if I should prioritize getting the Mortis skin first, or if it would be better to get Lily first and postpone getting Mortis for later.