I've found an easier Sukukaja combo than the ones listed... does a bit less damage, but I'm having way too much trouble landing all of those 5A's than it's worth.
5AAAAA > j.2C > 236B > j.214C > 214214D [2976 DMG]
C version of the super is easier to hit generally but will obviously do less damage. The D version can be tricky to time as if you do it too early you'll end up getting Garudyne.
Edit: After experimenting a bit more, if you just cancel V slasher into the super rather than trying to time it after it hits, the timing may be even easier. It's kind of wonky though...