Ultron Bomb/ Capt. America question

How many covers in Cap’s Red or Blue do you need to take out a Bomb tile? I’d assumed 5, but if the Bomb tile is equal to a Strike/Protect/Web/Attack tile then you’d only need 3.

Has anyone with 3 covers tried to take out Ultron bombs?

Ultron’s tile is a special which doesn’t fall into one of those 4 categories. For example, Falcon can’t target it either no matter what level/covers because his language never changes to ‘any tile’. So you need the 5th red/blue cover to target the bombs.

My rogers is 3/5/3 and I can’t overwrite Ultron’s bomb with his blue, so I’m using the 2* version…