Team. Metamorpho is a beast. Also Shift (basically a part of Metamorpho that broke off and became a seperate "Metamorpho" was able to interact and control electronic things like computers IIRC. He was re-absorbed into Metamorpho so I would assume he also has those abilities (I have no kowledge of him using that ability seperately) Could help tip the scales.
Bentley
Metamorpho is uber, I don't know how such machine control worked, but Ultron's electronic parts are covered by a forcefield.