[Martial Arts] Would this be a valid skill adaption perk?

[aesir23]

Originally Posted by Fred Brackin

It depends almost entirely on what the default _is_. If it defaults to base Skill it's too powerful, allowing you two skills for 1 pt.

If the default is -4 or so it's only barely useful. You'd have to have Two-handed Sword at DX+4 for the Perk to be better than buying Two-handed Axe/Mace directly.

So what is the default?

The murder stroke isn't a Technique in the GURPS sense. It's just a strike with Two-Handed Axe/Mace, but performed with the cross of a sword.

I disagree with your premise, though. It's not giving you two skills for the price of one, it's allowing another use for the Longsword. I don't think the OP was suggesting he be able to fight with an actual Greataxe using the Two-Handed Sword skill (that would be Weapon Adaptation).