Hey, rather than clogging your comment section, figured I'd drop you some ideas this way instead. I dunno how unique you'd want to go with these weapons, but these are kinda different with little mechanics on them that make them different to most others. :)

So, howabout a spear/Staff based weapon that instead has a combo attack on it? For example something like a science based version of the Jingu Bang (weapon that the monkey king uses, magical extending staff).
Basically it'd have the spear stab attack, then it would transition into the broadsword overhead swing, a normal attack version of the spear spin special (a few spins on a single attack) then end with a longer range broadsword strike that would have increased knockback on it, all while, if possible, being aimable.
The Special would be an Empower that doesn't drain as fast as normal empower but each couple of seconds it's left on it would spawn a clone of yourself with weak HP (or just a shadow NPC also wielding the weapon if you can't copy the players looks to the npc) who would be able to use the weapon and attack with you and when it dies it explodes in a poof of smoke that would launch enemies into the air (a trickster dust poof explosion of some kind). Finally ending the empower early will trigger a high damage overhead strike that is very long like the giant sword ability only atleast twice as long range while despawning all your clones.
Although, if you can't get the clones to work I'd say atleast make it have the gaint sword power with extended range.

Something else could be a 1 handed "Needler" weapon, which shoots energy dart like projectiles that stick into enemies and the ground that you hit. Then after 2 or 3 seconds of not shooting anymore it would trigger all the shots in the area to explode and deal damage in a small radius all at once possibly causing massive damage (and cause it waits for no more shots being thrown, you could dual wield to put out twice as many needles to make really big blasts).