Which unduped 4* should I level up ?

Babura0

I have following 5 unduped 4* champions :
1. Spider Gwen
2. Deadpool ( X Force )
3. Iron patriot
4. Guillotine
5. Winter Soldier
Out of these 5 champions, which one should I level up ? Thanks in advance for help.

Drpancakes

Guillotine