Greninja Footstool Kill Set-Up

[DX_97]

https://www.youtube.com/watch?v=pVkKE1XT9p0
^From 0:13, iStudying does a grounded footstool -> dair-> ff-> fs-> 1-2 hits of bair -> f smash.

I want to know when I should go for a grounded footstool, cause when I try to apply ^ to my gameplay, I have approaching and getting the grounded footstool.

 

[Guimartgon]

That wasn't grounded FS(Grounded FS don't make the opponent trip, they just make greninja jump without using a jump). That was Nair to footstool.

 

[lmntolp]

I know footstool->dair on an opponent in the air is untechable, but is footstool->dair against a grounded opponent untechable too?

 

[Larkisaurus]

The only thing that the first footstool does is make the second footstool send him lower, which lets the greninja not need to fastfall and focus only on reading DI. Footstools beat out grabs and landing lag, but you will not put opponents in footstool animation if they whiff an attack. Go for this if you read a grab attempt or feel like styling off an unsafe landing option.