i know a good combo 4 akuma
do the dragon kick and when the opponnent and u are still in the air do the hyper air gouhadoken
ur opponent should be flung to the ground but will still be getting hit
then u can (while he is still doing hadokens) do the combonation fo ur next charachter's super (cable's hyper viper beam works especially well) and he or she'll come in and do it
u must b at leats level 2 2 do this devestating combo.(juggernaut also works well instead of cable or if ur level 3 u can do the combo 3 times [firts akuma ,then cable,then juggernaut])

now hat will definatly kill an opponent!(not to mention if hes using a helper!)