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Swordstaff says hi! As do nagamaki! Usually, though, it's that half-and-half is generally a bad ratio. If you can grip the sword along the blade, then why is the longer grip needed? You've got a multi-purpose grip right there in your armored hands.

Alternatively, if you have a long grip, why do you need the extra weight of a long blade? That extra weight would make any potential slashing motions unwieldy, so generally a shorter blade is preferred.