I'm new to the game so I'm not sure if this is the right place to put this, but either way, I'd love some advice.

I was gifted both a Brawl and Rumble applicator from another user, and I really would love to use the Brawl to add it my king. He already had Rumble when I bought him, though it's only at 15% so it's almost entirely hidden. After a quick google search to figure out the colors, I came across the old drama about the markings, and now I'm afraid to add Brawl to my king even though he already has Rumble and is probably unbreedable according to more experienced players.

So, since he already has Rumble, would it be fine to add the Brawl? Or is it bad to even try using it at all due to the controversies and health scares? Would it be fine to add if I only use the Inverted version since there's a lot less noticeable pattern? Would a lower opacity like the 15% Rumble be better? Would I be better off just pretending I don't have the applicators in my hoard?

I appreciate any help and advice given! Thank you!