Don't bother - there isn't a current long lens among the platforms. The closest you'll get is in the Pentax world, with their 800mm lens, which when you factor in crop and that it's a full MF lens, working against a 50mp chip, you're almost back to where you started. Unless you've got a docile or non-moving subject that can handle the clack of a giant mirror, and can get close - as in shooting with a 200-300mm lens, stick with the Nikon gear. How much do you currently shoot at f/8 or f/11?
The only way I'd use a MF camera is shooting at a zoo or preserve, where I can get REALLY close. Otherwise I'm cropping to no end and erasing that added resolution. Looking at the shots, I'd think the tail was moving constantly, so you're up against the max shutter speed of 1/2000th with the Hasselblad lenses (orange square) or 1/4000th focal with the XF. With f/8 you'll be at the top end of the ISO range right?
The shots I'd use MF for is where the cats are part of a larger scene, like a pride chilling under a tree or such, where the framing is wider. That way when printed, you can see the details in the cats, the trees and such. But when you're dealing with weight limits, is it worth the costs?
