Who to upgrade? Ultron or Doc Oc?

DELIRIOUS

Two champions that I really adore and love fighting with; Ultron (4* awakened - sig level 40) and Doctor Octopus (5* unawakened)...

I have the tools to take one of them up a level. It will be max level for 4* Ultron, or 3/45 for 5* Octopus.

Any opinions on which one you'd rather level up if you were in the same boat?

V1PER1987

5* Doc Oc. He’s a 5* and doesn’t need a dupe to be effective. Infinite power lock/heal block, good durability, good attack.

Rfmn10

Octopus