Who to 6 star?

Finally able to 6 star for my first time and having trouble deciding who should get it. My Zilitu is my strongest DPS right now but from what I’m reading, Wrath is the way to go. Just got him recently. Vortex is my best healer. Baron my go to tank and Theowin, Calypso, and Idril are typically my snipers. New to this game so all advice would be greatly appreciated