I’m sorry, but I’m not understanding your question. All the cameras you mention are reliable prosumer cameras that offer decent green screen results under good lighting and data control.
Personally I wouldn’t mix and match cameras with different codec specifications and sensor sizes. If I am forced to use the XF305, I’d pick the EX3 or another XF305. Or I’d pick three 5D Mark IIIs and so on.
E.g. if you’re in a studio environment, cameras with HD-SDI linked to a genlocked (if you can swing it) switcher will give you the fastest workflow. By using similar cameras you can set similar green screen settings, exposure, etc., and have a fast multi-cam edit. Hope this helps.
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