[SSJKarma]

well ASHURA SENKUU is th ebest for akuma, cause with it, you can go where your insttinct tell you your opponent will land after jumping out of your way.

use it a lot to move its faster and its accurate.
as for raging demon, will never work against an hadoken happy player, it wil always knock you out of it, i know i become one when i see my opponents getting near level 3 !

too bad SHIN AKUMA can do it at level 1 !
anyway...
also, the best way around them is thru the hadokens !
it may seems hard but it always worked for me.
just jump in forward and at the moment your charcaters launch into the air, hold the block until you reach ground and repeat until you're up close.

but its all depending on your instinct toward the fact that you must predict what your opponent is gonna do, for some odd reason now, i know when my opponent will be doing an hadoken. so i counter before they do !

that's about the only advice i can give, its all up to you to see what you can and cannot do in certain situation !