If you could combine two weapons at once

[Mythris]

demon scythe + musket = EXTREME SLOWNESS

 

[Infinity Mage]

Sniper rifle = shroomite diggin claw.
the shooting speed (And the digging)

 

[PastaLaVista]

Blizzard Staff + Staff of Earth

A staff that summons boulders raining down from the sky, gaining velocity on the way down, resulting in some ridiculous damage output.

 

[Brony Bonfire]

Horseman blade and shroomite digging claw, imagine the pumpkins crunching up ground as they seek out their enemies.

 

[Solvandus]

Bananarang + Possessed Hatchet. All I have to say (while my brain tries to think of other hilarious combo's)

 

[PulseFox]

inferno fork + blizzard staff = armageddon staff

 

[SnailsAttack]

Vampire Knives + Mega Shark + Meomere

 

[Blue the Swordsman]

Vampire Knives + Mega Shark + Meomere

Only two weapons at a time.

 

[PulseFox]

Chain gun + inferno fork. everybody dies.
vampire knives + mushroom spear.

 

[SnailsAttack]

Only two weapons at a time.

Too bad :l

 

[Blacklawn]

Blizzard Staff + Inferno Fork = rain of explosive fireballs!
Chain gun + Terra Blade = total obliteration

 

[Under cover cabbage]

coin gun + nimbus rod = ITS RAINING MONEY

 

[Vaeldras]

Revolver + Snowman cannon

 

[SzGamer227]

Yeah... this is my choice.

 

[Khaelis]

Tsunami + Chain Gun, just because I want to fire 5 arrows simultaneously at insanely fast speeds.

 

[Enjl]

Magnet Sphere and Tempest Staff:
A floating sphere shooting out Sharknados in every direction which THEN spawn sharks which kill enemies.

Rod of Discord and Marrow:
Whereever the arrow lands, you'll be teleported to that position. Inflicts the Chaos State debuff.

 

[Techno Mancer]

Copper shortsword+terra blade=lasers out the pelvis

 

[Noobiescrubpleb]

Horseman blade and shroomite digging claw, imagine the pumpkins crunching up ground as they seek out their enemies.

That reminds me of a movie...

 

[Under cover cabbage]

vampire knives + meowmere = exploding lifesteal

 

[3en]

Chain Gun + North Pole
Terra Blade + Shoomite Digging Claws (Just for the speed. )
Chain Gun + Terra Blade
Terra Blade + Vampire Knives
Horseman's Blade + Terra Blade
Christmas Tree Sword + Horseman's Blade (When Holidays Collide...)