Air weapons (Air Shooter, Wind Storm, Tornado Hold, Tornado Blow, Barrier Wind, etc): Trinity Storm: A small vortex of wind, ice and electricity flys forward slowly, rips, low ammo.
Cutter weapons (Cut, Quick, Metal, Shadow, Tomahawk, Slash, Blade, Blade Tengu (blade)): Diamond Blade: Think charge kick (as an arm slash) but must be standing.
Rock/Crystal/Earth weapons (Guts, Stone, Jewel, Crystal, Uranus, Concrete): Boulder Cracker (see D.I.R.P.)
Electric weapons (Elec, Spark, Bit, Cloud, Clown, Plug, Sheep, Dynamo): EMP Burst: Fires a small slow electric shot that explodes into a large radius blast when it hits. 4 shots and low RoF.
Explosive weapons (Bomb, Crash, Dyna, Napalm, Galaxy, Burst, Drill, Ballade, Grenade, Pirate): Artillery Drop (not sure on name): Fires a shot that travels along the ceiling while the button is held and drops down when the button is released, explodes on contact with ground/player.
Fire weapons (Fire, Heat, Pharaoh, Charge, Flame, Turbo, Burner, Sword, Magma, Solar, Torch): Kitsune Fire: Summons 9 flames behind FG which block 1 attack each (from behind only), firing again shoots 1 forward (for either a single hit, or a quick burst fire)
Ice weapons (Ice, Blizzard, Frost, Chill, Cold, Freeze): Avalanche Strike (name may change): Sends forward a player width sized snow attack that travels a short distance and pushes targets back.
Shield weapons (Volt, Wood, Enker, Plant, Skull, Junk): Mirror Reflector: Drops a mirror that sits in place and retaliates against attacks with a single straight forward attack (shots travel through the mirror) (If not able to be done (or not wanted due to fire being a shield, dump shield weapons into everything else)
Water weapons (Bubble, Aqua, Wave, Neptune, Venus): Water Skipper: Shots a weak quick fire water shot that bounces on the floor (much like Wild Coil), but not walls.
AOE attacks (Centuar, Bright, Flash, Astro, Gravity, Time, Toad, Saku): Oblivion Buster (see D.I.R.P.)
Everything else (anything that doesn't fit into any of the above): Block Drop: A 32x32 block appears in the air and drops down, dealing damage to anyone it hits, if it does not hit a player before reaching the ground it stays for some time it and becomes able to be used as a platform.
And Block drop should be Block Builder, also could work better how is.