Luigi's aerials are great. I see a use for every single one of them. Many characters will have one or two aerials that aren't so great... but LUIGI FTW 
He has 2 strong killing moves, the Fair (Chop) and Dair. These two will kill at maybe 70%+ depending on character. This is just generalized though. A true Luigi player can kill at lower percents
(opponent loses second jump to Luigi wd off stage to chop/luigi skillz).
I find Luigi's Uair and Bair to be the most defensive. Bair, as most Luigis no, can be used twice in one shorthop, or just Bair to waveland to another SH Bair. Many combos come out of it. You can push the opponent off the stage with multiple Bairs or use it as an active sheild. Overall, Bair is t3h pwn4g3z0rZ. Uair has the great overall range of Luigi's aerials. When your opponent is above you, usually you can use Uair (timed correctly!) to cancel their move. This has some comboage in it, but personally I find it more defenseive. As we all know, Luigi can be extremely variable.
Luigi's last aerial is the Nair. You people have probably read many PimpUigi quotes about this move is Tobias' guide. A combo that I learned works well on floaties maybe around 70-80% or maybe lower/higher depending on who is the Dthrow to Nair. The Nair can be sweetspotted or not. You get the sweetspot rght when the kick comes out, this sends them much higher than usual. If they are hit with the kick after the sweetspot.. well then it isn't sweetspotted. Unlike some moves, the unsweetspot might be a better thing, namely juggling or setting up for a finisher. For the Dthrow to Nair on floaties, you need the sweetspot. First, you Dthrow. Then you turn around and SH/Full Hop to Nair. Very easy but effective.
The unsweetspotted Nair (USNair for now, I'm tired of typing that out) can be used into a finisher (Fair/Dair). It could even be used into one of the defensive aerials. If you can get your opponent to jump twice, USNair into a finisher or maybe a Bair. Both could work. You don't even need the USNair depending on the situation, maybe just Bairs/Chops. Luigi is just too situational.. he's too variable. I say he's broken.. jk
A tactic that can be used quite well is the Ledgehop to Aerial-Nair. This works only if your opponent tries to sheidgrab your first aerial, which is a lot of people considering they aren't used to vs Luigi. If the first aerial hits,, hurry I guess. If it misses and they sheildgrab, then they will have a USNair in their face. From there combo (maybe Uair?). I mostly would suggest using Chop to Nair considering the chances that it might actually hit instead of the Nair. It's probably going to end up being better than a Bair or Dair. Once again, it is situational. One other thing you could to is Ledgehop to Bair to Chop, then they have a chop in their face. Situational once again. I'm sure there are other combinations, but you get the picture. They basically all work to Nair cept for Uair, it has more of an Upward hitbox.. or maybe it does work..
SIMPLE YET ANNOYING COMBO: Uthrow them. If they DI behind you the fullhop Backair. It works and it is annoying. You can get a bit of damage and they won't know what to do against it the first time. Who would predict such a weak attack? BUT, from the Bair you could probably DI towards em and Uair with its great Upward hitbox.
If they DI in front of you, I imagine an Uair would work.
Note: if you Uthrow a fastfaller at semi-high % then just do Uthrow to Chop for Luigi's sake.. Bair still annoys them and could work just as well if you Bair them right at the ledge off the stage.
Dthrow to aerials. Great combo. Like I already said, Dthrow to Nair on floaties. Otherwise, some htings like Dthrow to turn-around Chop works cool. Or just Dthrow to Ftilt if their percent isn't high enough.
When in the air fighting someone, usually you can get out of a tight situation with Uair. It isn't the strongest but it is very fast and has a good hitbox. Godd enough for Luigi, hit em while they have startup lag.
Try and put pressure on them with things like Wall of Pain Chops and Double SHBairs.
Note: Luigi pwns
Note 2: Lots of this is situational, just gives you some ideas that you can mix up for diff situations
Note 3: Luigi is so cool
Note 4: LUIGI FTW
He has 2 strong killing moves, the Fair (Chop) and Dair. These two will kill at maybe 70%+ depending on character. This is just generalized though. A true Luigi player can kill at lower percents
(opponent loses second jump to Luigi wd off stage to chop/luigi skillz).I find Luigi's Uair and Bair to be the most defensive. Bair, as most Luigis no, can be used twice in one shorthop, or just Bair to waveland to another SH Bair. Many combos come out of it. You can push the opponent off the stage with multiple Bairs or use it as an active sheild. Overall, Bair is t3h pwn4g3z0rZ. Uair has the great overall range of Luigi's aerials. When your opponent is above you, usually you can use Uair (timed correctly!) to cancel their move. This has some comboage in it, but personally I find it more defenseive. As we all know, Luigi can be extremely variable.
Luigi's last aerial is the Nair. You people have probably read many PimpUigi quotes about this move is Tobias' guide. A combo that I learned works well on floaties maybe around 70-80% or maybe lower/higher depending on who is the Dthrow to Nair. The Nair can be sweetspotted or not. You get the sweetspot rght when the kick comes out, this sends them much higher than usual. If they are hit with the kick after the sweetspot.. well then it isn't sweetspotted. Unlike some moves, the unsweetspot might be a better thing, namely juggling or setting up for a finisher. For the Dthrow to Nair on floaties, you need the sweetspot. First, you Dthrow. Then you turn around and SH/Full Hop to Nair. Very easy but effective.
The unsweetspotted Nair (USNair for now, I'm tired of typing that out) can be used into a finisher (Fair/Dair). It could even be used into one of the defensive aerials. If you can get your opponent to jump twice, USNair into a finisher or maybe a Bair. Both could work. You don't even need the USNair depending on the situation, maybe just Bairs/Chops. Luigi is just too situational.. he's too variable. I say he's broken..
jkA tactic that can be used quite well is the Ledgehop to Aerial-Nair. This works only if your opponent tries to sheidgrab your first aerial, which is a lot of people considering they aren't used to vs Luigi. If the first aerial hits,, hurry I guess. If it misses and they sheildgrab, then they will have a USNair in their face. From there combo (maybe Uair?). I mostly would suggest using Chop to Nair considering the chances that it might actually hit instead of the Nair. It's probably going to end up being better than a Bair or Dair. Once again, it is situational. One other thing you could to is Ledgehop to Bair to Chop, then they have a chop in their face. Situational once again. I'm sure there are other combinations, but you get the picture. They basically all work to Nair cept for Uair, it has more of an Upward hitbox.. or maybe it does work..
SIMPLE YET ANNOYING COMBO: Uthrow them. If they DI behind you the fullhop Backair. It works and it is annoying. You can get a bit of damage and they won't know what to do against it the first time. Who would predict such a weak attack? BUT, from the Bair you could probably DI towards em and Uair with its great Upward hitbox.
If they DI in front of you, I imagine an Uair would work.
Note: if you Uthrow a fastfaller at semi-high % then just do Uthrow to Chop for Luigi's sake.. Bair still annoys them and could work just as well if you Bair them right at the ledge off the stage.
Dthrow to aerials. Great combo. Like I already said, Dthrow to Nair on floaties. Otherwise, some htings like Dthrow to turn-around Chop works cool. Or just Dthrow to Ftilt if their percent isn't high enough.
When in the air fighting someone, usually you can get out of a tight situation with Uair. It isn't the strongest but it is very fast and has a good hitbox. Godd enough for Luigi, hit em while they have startup lag.
Try and put pressure on them with things like Wall of Pain Chops and Double SHBairs.
Note: Luigi pwns
Note 2: Lots of this is situational, just gives you some ideas that you can mix up for diff situations
Note 3: Luigi is so cool
Note 4: LUIGI FTW
