This actually isn't that bad of a fight. Wonderman is crazy strong, has flight, and can give Mags problems. Magneto cannot just use his " ill take the iron in your blood trick". First there has to be an excessive amount of iron in Wonderman's blood to do that, and second he has to concentrate much harder to accomplish that feat, and with Wonderman flying around all over the place thats going to be quite diificult. Therefore, Mags is going to have to actually fight Wonderman by using other skills such as launching metal objects, projecting his shield, creating an anti-gravity field around Woderman to bring him down etc etc... In the end I believe Mags takes this 7-8/10 times.