There are some circumstances where you can't raelly use omoikane and RC to continue a combo allows the opponent to be able to burst. So like if you do say this combo 2b 3c 2b 5c 6c. If you were to continue this combo just regularly even, the opponent can burst out if they know the normal combo will kill them. By adding 6d 632146d, you make this combo burst safe so even if they bursted, you can still maul them.
EDIT: Just so everybody knows, I'm currently working on a guide just I haven't had much time as of late due to work and personal life. I should be working on it. I think it's pretty close to being done. Just wanted to throw that out there.