Hmmm, I am not sure tbh. Would it be weird if characters like mascheny or evankhel can simply shape their elements any way they want? There's definitely going to be a functionality issue but otherwise there's nothing we know of that limits supremely skilled folk from anything of the sort. Rak used something that was called a spear but it wasn't even properly defined, it looked like the rocks on his arm extended. TBH I'd lean towards dumas identifying rak as an ancient simply because he could recognize the power. Or because the way he manipulated rocks could be connected to that. It's not like rak is using a foreign power or anything of the sort. He is using his innate strength and his atribute is a shield, not a spear (yet). it'd be weird if rak's ancestors' power had something spear related going on but that wasn't rak's primary attribute.
Evankhell or maschenny can only shape it out on the air, outside their body, they cannot shape it as a tool extended their body for example like long needle/fork/whipe element covered in their arms, if they can do that they can fighting more freely not just everytime element shinshu they shoot they need make it again.
As for example:
-If eduan can make extended lightning spear shape attach to his hands/arms he can just punch as many times as he wants no needs to make spear anymore plus he can make spear in the air and throw it how strong he will become?
-If zahard can make his golden needle shape attach to his arms/hands, make cosmos in the air and he punchs extended shaped golden needle that covered in his hands as fast as he can then shoot his cosmos, he will be become so strong. Even data zahard try imitated covered thing that native one/ancient can do by the used of his shinwonryu to his whole body.
-White if he can make his manmade sword attach covered his hand he doesn't need grip it he just swing his hand even both his hands to slash enemy, he will become powerfull and he can be use two swords.
-There's one person can shape his shinshu looks like arm that he is kallavan, but he cannot extended his arm like luffy do in one piece or more like tracked his enemy with his shinshu shaped arm, if he can extended his shaped arm shinshu to punch someone out of his reach then delivered his explosive shinshu when his long shape punch touch them, or wrap his enemy with his extended shaped shinshu arm and make another explosive shinshu with another hand out of air, how effective/efficient his attack will be?
But they cannot do that, only ancient/native one can do that attach shaped element to themself make it extended and make that element on the air too, because of that eduan said ancient/native one is so strong.