That is what Outrun is saying.
It works both ways, if you don't want him to see YOUR attacks then you in turn won't be able to see HIS attacks against you.
Frankly, I respectfully disagree with your entire request.
I don't have enough time in my day to do max effort, this game is a giant time sink.
If my opponent has cleared me and I'm short on time then I'll attack once & not bother trying to use my entire lunch to clear him.
If he hasn't attacked at all then I'll do a couple attacks & call it a day.
If it's 50/50 then I'll base my attempts & on my schedule & also how it looks.