Current music:

Dandelion by Dew.

Two things *spoilerish for Akainu's really obvious powers*
Cannonballs in One Piece: From what I can tell so far, the physics work similar to a artillery shell (lame analogy I know) but basically the danger of the cannonballs is that it's propelled out of a cannon and then explodes upon contact rather then the momentum of the cannoball itself. Although, given how it's been shown to explode upon contact (wood, ships, ground in Buster Call) I find it strange that it doesn't explode when it comes into contact with human flesh as Robin is able to net balls without it exploding, Sanji is able to kick the cannonball back etc etc. So out of all things, the protaganist human flesh are immune to not only the dangerous force but the incendiary power of the cannonaball as well? Also, it's strange that they've been able to create explosive cannonballs and yet there are no grapeshots. I'm pretty damn sure from experience that if the Marines were smart they would have realised by now 'hmm cannons don't seem to work on Luffy so why not cut with scrapnel'?

tl;dr: Exploding cannoballs. Effective on everything except the Straw Hat crew with their character shields.

What do you think of this fridge logic?

Also

Just as a bit of a challenge try creating a original combo attack involving two or all three Marine Admirals. If you need refreshment, Akainu has lava/magma (would it be lava since it's being launched out from his body and magma while it's not?), Kizaru is a Light Man and Aokiji ate the Ice Ice Fruit.

Basically, try to do in in this format Name:Description with participant's name. You don't have to provide the name of your created attack in Japanese or romaji but feel free to if you want to. Anyway here's what I've come up with so far

Admiral Sentai Combo: Akainu decides to rip off Pirate Docking from the Straw Hat deciding that 'the forces of justice can do it better'. Akainu has his legs carried by Aokiji forming the left leg with his bottom half in ice and Kizaru carrying his right turning his legs into light for speed. Akainu forms the body and turns his two arms into fists of lava. Hence with their powers combined they are...Taisho Zord?
*Fist Of Justice: Akainu punches the enemy with his two magma fist
*Roundhouse of Justice: Akainu kicks his left leg Aokiji into the enemy's  mid section followed b Kizaru who subsequently kicks the frozen midsection breaking the person in half.
*Pyroclastic Headbutt: Kizaru blasts off with lasers whilst Akainu turns his head into magma both burning the opponent as well as pushing him backwards from the momentum of the lightspeed attack

AkaAoKi Iai: Aokiji slashes the opponent midsection with Ice Saber before Kizaru slashes him upward with Ama no Murakumo causing him to fly upwards before he is forced back down by Akainu who forms a whip made of magma (not canon attack yet).

Tunguska Impact: Kizaru uses Yasakata no Magatama to shoot laser beams into a large ball before Akainu covers it with magma followed by it covered in an outer layer of ice frozen by Aokiji. The subsequent ball is then kicked down by Kizaru like a giant asteroid and upon impact the magma is released burning anyone who wasn't flattened underneath followed by an explosion as a result of Kizaru's core of light.

Rain of fire: Akainu fires many small balls of lava which are then frozen by Aokiji while he is intangible as shards of ice. Subsequently the person is pelted by rock projectiles (slightly obsolete though as lava is probably more effective then rocks.

Wrath of Ra and Vulcan: Kizaru appears behind an opponent while Akainu is in front of him. He is subsequently attacked simultaneously by Kizaru's laser beam from his leg as well as Akainu's Dai Funka.

Magnifying Glass: Aokiji forms a clear ball of ice which Kizaru then fires at. The Light is concentrated into a single point burning said person like an ant with fire. Ice ball can then be moved around to more poor blokes who'll be running away from the trail of fire following them. Yes you can use ice to make fire. Quite interesting, saw it on Mythbusters.

Pinball Machine: Aokiji forms block of ice around the ground. Kizaru then uses Yata no Kagami bouncing off these reflecting blocks and hinting as many people as possible.