Red Roman Cancels can be used in Ramlethal's midscreen combos to give them extra corner carry. Almost amything goes, but do keep gravity scaling and wall health in mind when extending certain combos.
The following combo examples should provide an idea to how Red Roman Cancels can be used in Ramlethal's combos, but feel free to practice and experiment. Even with just the routes listed here, a wallbreak after RRC should be possible anywhere on the screen.
X > 66RRC, c.S > 6H > 236H
The first half of the Core Combo for corner carry. Note that continuing the combo after 236H might lead to a wallsplat, so end the combo here if you want to keep the corner.
X > 88RRC, (c.S > ) 2H > 236S
An alternate route to keep the opponent higher or sideswap. Can be kept burst-safe by omitting the c.S.
X > 88RRC, c.S > 2H > 236S (sour spot), 66 5K > 6H > 236H
Only possible with low gravity scaling. This route has longer corner carry than the others. The sour spot requires the opponent to be above the sword rather than being hit by it directly. It will bounce the opponent up and away instead of carrying.