I really like anything with decent flags like Stun Chance, and stuff that can combo like Crushing with Freeze Chance. Anything that can reduce an enemy's ability to perform actions (stun/trip) is always super valuable.
The
Custom Shock Gear is just super good. The damage combination works good on shields or armor, and even if it's damage isn't the highest for melee weapons, the Stun Chance and Bonus Hit Rate make it super easy to lock down enemies. Combined with any weapon with Freeze Chance and you can alternate between stun and freeze to completely shut down any single enemy with ease. Also, getting to fight hand to hand is awesome.
The
Light Savacite Maul is fun, it has Stun Chance and Crushing too, and is hilarious on a Melee Tech with Charge Weapon. The damage multiplier from shattering Frozen also applies to the Lust damage, which is neat. Unga Bunga Horny Bonk.
The
Tri-beam Rifle is a fun one. Multiple damage types and Bonus Hit Rate, so it's super consistent. No special flags, but decent damage.
I love the idea of the
Knuckle Busters, but the lack of traits other than Stagger kinda kills it for me, especially compared to the Custom Shock Gear.
Edit : Been testing the Knuckle Busters and
Hailstorm as a combo. Stagger and Trip are still decent statuses, and the damage output of the two weapons is solid (on top of having decent damage types). Still not as strong as Stun, but very workable.
Honorable mention for the Sleet Shaft (found on Uveto), since it has both Freeze Chance and Crushing, on top of Bonus Hit Rate. You'd probably want to look at getting Stun Chance elsewhere from either the
Shock Bow or
Heavy Slut Ray.
Not technically a weapon, but the
Bimboleum Defense System is hilarious on a anyone with big shields, especially a tech. A fantastic final fuck-you that hits every enemy on the field and can instantly end an encounter if the enemy doesn't have a Lust reset ability.