For Super Skrull:
Flame kick is not special or hyper cancelable so you will have to “link” this. That means it’s not going to be a cancel like you would do otherwise, there is some time after the flame kick and before you input the Orbital Grudge L. Not a lot of time, but time none the less.
I’m not sure, I’ll have to look at this one myself but is this S>Ragtime Shot L in the middle of a combo? That shot explodes sometime later so you might have to hit S, cancel it to your explosive arrow and then continue the combo, having the arrow explode later for damage?
edit 3: Unless you mean Ragtime shot? If so you have to press up forward or up after putting it in because you’re super jump canceling that input. You are doing the S, and then canceling that S into a super jump, THEN canceling that super jump into a Ragtime shot. Still don’t know what you’re talking about for Super Skrull.
edit 2: Are you talking about the right missions/dudes? I don’t see any missions from Super Skrull that even have Flame Kick in them.
edit: Just looked it up and I cannot find the S > Explosive Arrow you talk about but this might help more: