> Well, for some of these characters size is irrelevant. Saber, for example, shouldn't have to worry about her opponents size in combat.

Exactly. Blackout is big and slow. I don't think you ever see him run in any of the scene's he's in.

Also, I want to point something out. Blackout was killed by humans. That's military humans with no magic, no psychic ... stuff. Nothing except good 'ole fashioned big guns. In fact, in the base attack scene he was seemingly harmed by a human with a grenade launcher. Not much harm done, but enough to warrant him launching flares to prevent further attacks. Basically, so long as he keeps you from hitting back with anything heavy he's unstoppable. Once you start hitting back you can find his weaknesses and beat him.

[Watch this](https://www.youtube.com/watch?v=xvYWG-CypGM)

[And This](https://www.youtube.com/watch?v=IMo_Jx35SZw)