Getting Ellen in 1.5 or not

Hi

So, I have started playing zzz from the start, but at the beginning I wasnt really feeling the game so I didn’t pull Ellen(love her design, music videos etc) .I pulled miyabi without her w engine, and there is an problem. Knowing that Ellen will return in 1,5 I would like to pull for her. But looking only statistics miyabi is just better frost damage dealer.

I don’t know if I need another frost damage dealer and weaker than miyabi. Is there any advantage of having 2 frost damage dealers ?